hearts. very important education there indeed. a lot of news. over to the newsroom with ms. carol costello. >> have a great day. "newsroom" starts out in. happening now in the "newsroom" -- surface -- the sonar sub's hunt -- cut short. >> we just hit a deeper spot than we initially planned. >> the first mission aborted hours early. direct challenge. a russian fighter jet buzzing an american war ship. >> depending on the calling, the 19-minute close encounter pro vauk tish and unprofessional. >> making 12 passes. >> the most direct challenge to a u.s. destroyer. >> as violent protests sweep across the country. hailstorm. millions of a path of severe

weather. >> the bigger story is this huge temp. >> temperatures plunging 30 degrees. storms turning into snow. you're live in the "cnn newsroom." good morning. i'm carol costello. thanks so much for joining me. the bluefin 21, the drone submarine, could go back underwater at any time. at the moment, the weather's too rough. searchers are eager to continue, though, despite the fact the bluefin's first mission surfaced early and turned up no new leads. now, the sub did scan the water for about seven hours, but it had to resurface when it reached its maximum depth, about 2.5 miles down. also this morning, the malaysian government announced it will set up an international investigation team to unravel the mystery surrounding flight 370. in kuala lumpur, malaysia with more on this. good morning.

>> reporter: hi, carol. the purpose of the international investigation team is really to evaluate what exactly happened with mh-370 and avoid such an incident in the future. the team will be made up of three specific groups a the air worthiness group, which will basically would be looking into the maintenance records to see whether this plane was actually adequate, or worthy of flying. there will be an operational group which will be looking into the flight records and operations and also the weather to see if any of those things were a factor in the disappearance of mh-370, and finally, there will be a medical and human factor group, again, basically looking at the records of the pilot, to see whether they had in psychological problems, and also to see if the disappearance was a result of a human error. carol? >> and i want to talk a little

about the black boxes. malaysia now said it doesn't mat here gets custody of those black boxes. does that mean malaysia would be willing to turn them over? >> reporter: that's right. the acting transport minister here saying today that he doesn't really care who takes custody of this black box. his main aim is to find out what exactly happened, the truth. have a listen. >> i don't think it's important who gets custody as far as i'm concerned, and this is my own personal position. it's finding out the truth. and we're going to find out the truth, we have to review what's in the black box. so there's no question. >> reporter: now, according to international protocol it is the country to which the black box belongs to that takes custody, or that takes leadership of the investigation, but the malaysian police chief has already come

ount and said that malaysia actually doesn't have the expertise to open the black box, to read that data. so they will be looking elsewhere for help. now, we know that the u.s., the uk and australia has those capabilities, but who exactly the malaysian authorities will be turning to, that is still unclear at the moment. carol? >> reporting live from malaysia this morning. thank you. learning anything from the disappearance of flight 370, it's that even these big, commercial planes with all their technology can simply disappear, go missing. already the faa is in the middle of a massive undertaking to change the way planes are tracked in the sky. in fact, the faa announced the completion of a nationwide infrastructure upgrade, which will allow air traffic controllers and pilots to track planes with greater accuracy and reliability. the new gps-based tracking system known at adsb has now been installed nationwide.

100 facilities are now using the system, which allows for almost continuous -- allows for almost a continuous flow of flight data to and from an airplane. all facilities and all planes will begin using this system no later than the beginning of 2020. joining me to talk about this and more, cnn's aviation analyst and former managing director for the ntsb and vice president and group general manager for a teledein systems. welcome, gentlemen. >> good morning. >> good morning. >> good morning. thanks for being with me. first off i want to talk about this new technology that will track u.s. planes even if they drop below radar. peter, on the surface, sounds so simple. you put a gps in the plane and the plane is tracked by satellite. why will this process take another six years to implement? >> well, we've got a lot of planes in the air that aren't

outfitted with what they call adsb out which is the -- avionics equipment that gathers the data and transmits it to the satellite. so they're giving the air carrier, the owners of the aircraft, time to retrofit their fleets. it's an expensive process. but you're right. 2020 seems an awful long time to be able to track aircraft over open ocean. ads sbch dchl adsb is not designed specifically for that but to increase efficiency of the air traffic control system. we can do better, quicker, there's technology that can help prevent an mh event in a much shorter time frame. >> a little confusing to me. all the ground stations are now in place. right? it's just a matter of making sure all of the planes are equipped with this gps system, which, you know, on the ground,

i'm in my car with my cell phone. i can program in where i want to go, satellite picks me up and takes me anywhere i want to go. is it that more complicated to put such a system in an airplane? >> it is. and you know, anytime you're -- you know, putting new equipment in an aircraft, it can be a challenging event, but in this case, you know, you've got thousands of aircraft that were built prior to, you know, 2006, that simply don't have adsb out capabilities. it's going to take time to retrofit them, and it's expensive. >> and just to be clear. this will only track planes in american airspace, not overseas? right? >> well, the europeans are moving towards implementing adsb as well as our other, as are other, australia's doing it. i think they've fully done it. so it's moving worldwide. >> i hope quicker than later. thomas, i want to talk now about

the bluefin 21 and the flight for flight 370. the bluefin reached its depth then automatically turned back when it hit about 2.7 miles down into the ocean. apparently the ocean charts were wrong on land. so explain to us what that means. >> well, a couple of things. first of all, we should know that the bluefin functioned the tway should operate. all auvs have a maximum operating depth. if they doubelow that they risk collapsing in on themselves. for safe operations they picked that depth as a design criteria. so the issue in the ocean is that the bathinatry is not well understood. the best you have, things called soundings from ship that help you understand what the, the general area, but there are going to be regions that could be deeper. regions that will be more shallow. so the vehicle needs to be able to operate as best it can in that without risking loss.

>> and the weather is rough today. that means they can't put the submarine in the water. which is -- i don't know. it works underwater. that's kind of hard to understand. >> well, so like a lot of things, the riskiest time for these types of systems is during launch and during recovery. and the rougher the seria, the higher the sea stake, the more likely for instances, for instance, a collision with a ship. when an auv and slip collide, the ship wins every time. >> i can see that. is there any sub meantry technology that can be used along with this drone submarine that might make the task faster? >> well, there are other types of systems. so what we're doing right now is, we're using the auv as a platform to carry the sonar. it's down there images the bottom. there are deep tow sonar systems that can also do that.

they're not very common. a few countries have them, but it's really, when it -- the reality is this is the study of the deep ocean is still pretty young and it's been state add couple of times by different people in interviews, you know, our knowledge of the deep ocean is less than our knowledge of some of the nearer places in space. it's really a -- the final frontier, let's say. >> all right. we're awaiting the weather to clear up and hopefully they'll put that submarine down again sometime today. thank you both so much. >> thank you. >> thank you. still to come in the "newsroom," too close for comfort. a russian fighter jet buzzes a u.s. navy destroyer, not once but 12 times. cnn's phil black is following the story for us. good morning. >> reporter: good morning, carol. yes, here in the east of ukraine, the government says it is fighting back with an anti-terror operation against separatists and pro-russian forces in the region. more details in a moment. [announcer] play close-good and close.

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. provocative and unprofessional. that's how the pentagon is describing a series of close encounters between a russian fighter jet and a u.s. navy war ship. officials say a russian plane made 12 -- 12 -- close-range passes over the "uss donald cook" in the black sea. in other words, the russians buzzed a u.s. warship repeatedly. now, the jet was unare aed but the bold challenge is seen as the most direct confrontation between the united states and russia in years. in the meantime, pro-russia

militants are refusing to give us ground in ukraine as violent clashes sweep across that part of the country. bringing in cnn's phil black on the ground in ukraine and ambassador nicholas burns, the former undersecretary of state for political affairs. welcome. >> thank you. >> ambassador, start with you. seriously? the russians buzzed a u.s. ship 12 times? what kind of message was russia trying to send? >> well, carol, it's a clear message that the russian government wants to intimidate the united states. the u.s. warship, of course, was in international waters. the united states actually has allies in the black sea. bulgaria and romania. we have a perfect right to be there but the russians are trying to put pressure on the u.s. to back off of any overt military support to ukraine. a decision president obama has not made. do we give it support to give it a chance to maintain its own territory? in the eastern part of ukraine,

these gangs are armed men, ethnic russians and the administration says supported by the russian government has taken over municipal buildings. this is a challenging time both for the ukrainian government but also for the u.s. >> go to phil black and ask what's happening in ukraine now because there are several things. we've heard that ukrainian officials are sending some sort of military equipment to eastern ukraine now to possibly fight back. is that true? >> reporter: the ukrainian government, carol is calling it an anti-terror operation. yes, essentially this is a fight back against these pro-russian and separatist groups and forces that have overtaken administrative buildings and infrastructure in cities and towns across the east. the ukrainian government has been talking about doing this for some days now. threatening the use of force, but hasn't followed through on it, yet. a little head tant. probably because there are no good options here for the ukrainian government. if they allow them to settle in

and hold, the authority of the government in kiev is diminished, eroded, but if they force a confrontation, there is a risk this could escalate quickly, that lives could be lost. that it could give russia a pretext for more direct military intervention, carol. >> phil, we just got in these pictures. pro-russian politicians at some sort of event and apparently ukrainians are fighting back using flour? we're going to put it up in a second. here's this pro-russian politician, and he's speaking in support of russia, and separating from ukraine, and he gets pelted with flowers and actual -- flour at this event. we've heard so many times, phil, that russian protesters go into ukrainian-russian buildings, government buildings, and u trainians just leave the buildings and allow the russians to take over. this demonstrates that that's about to end. >> reporter: it shows just how divisive the feelings are. not just in this country but

particularly here in the east. it's worth noting that this eastern region which is now very much in the grips of this crisis, it is not crimea, where there was this overwhelming majority pro-russian sentiment. the mood here is more mixed. certainly people here speak russian. identify, culturally, ethnically with russia but it doesn't mean they want to secede from ukraine or join the russian federation for that matter. you have committed groups occupying these public buildings that does not mean they enjoy overwhelming widespread public support. it means if this were to escalate, there is enormous potential for further violence and division within the society. carol? >> so ambassador burns, president putin apparently requested a phone call with president obama. the two men talked, and president putin said to mr. obama, you know, you've got to help me settle things down in ukraine. because things could get out of control with these ukrainian people. you know? it could turn into civil war. help us, and president obama

responded, well, we kind of thing russia's at fault. so what do we make of that? >> well, i think these two leaders are talking past each other, obviously. they completely disagree on what's happening. from the viewpoint of the united states, it looks like the russian government is actively aiding, planning these demonstrations and takeovers of ukrainian government buildings in the eastern part of the country. so the u.s. has to decide how far do we go in trying to push back against the russians? does it make sense to extend conventional military aid to ukraine, but also should the u.s. engage in another round of sanctions? there's talk this morning, carol you that the united states and the european union will soon announce more visa sanctions and asset bans against russian government individuals. that doesn't seem to be quite enough to counter what president putin is trying to do, if the u.s. and europe could announce big sectoral sanctions or

financial sanctions, that might be enough to actually affect the behavior of president putin but the u.s. and eu are not going in that direction. >> you know, it seems like president putin is fighting this weird psychological war at the moment. you know, on one hand, russian jets buzzing american war ships and on the other hand, president putin calls up president obama urging peace. it just doesn't make sense. >> well, i think it's a facade. president putin is aiming to destabilize the ukrainian government and really attack its credibility. if he can show that the ukrainian government can't even control events on the streets in eastern ukraine, that might be a pretext for president putin to send his own forces in, or to have a more overt russian policy to try to dominate eastern ukraine. so a lot is riding on the ability of the ukrainian government, and they've launched operations this morning to retake some of those buildings but as phil black says, if the ukrainian government goes, you know, uses strong means to gain

those buildings back that could provide the pretext for the us ares to say that the ethnic russians' rights are being violated. the ukrainians are in a very difficult situation. they have to show firm inside but also have to be restrained enough so it doesn't lead to too much violence. >> phil black, ambassador nicholas burns, thanks to you both. still to come in the "newsroom," last april 15th, three innocent lives lost, hundreds more injured when two bombs exploded at the boston marathon. boston one year later. we'll take you there, next. i've quit for 75 days. 15 days, but not in a row. for the first time, you can use nicorette even if you slip up, so you can reach your goal. now, quit on your own terms with nicorette or nicoderm cq. [dog] larrwanna play?arry? [announcer] a healthy dog is a playful dog.

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it's been one year since the impossible happened in boston. terrorists struck the mayor thorn and event held peacefully, proudly for decades. seconds after the bombs went off people risked their lives to help complete strangers. in the daysened weeks that followed, the city defined what it meant to be boston strong. overcoming injure es and of course rallying around their teams. world champion red sox, celtics and bruins. today the city remembers three people who lost their lives last april and hundreds more injured. an indoor tribute begins at noon with a uvg mooal performance by the boston pops, and then remembrances for the victims. and remarks by three of the survivors. vice president joe biden and governor deval patrick will speak. then it heads outside to the finish line where a moment of silence takes place at 2:49 p.m.

the most the first of the two bombs exploded. cnn brooke baldwin has more on the survivors and a look back at the manhunt that fopp falled th attack. >> you would never in a million years picture what happened here. >> could be anyone's neighborhood. could be any neighborhood, anywhere. >> reporter: retired sergeant sean murphy, photographer with the massachusetts state police, saw the entire seeiege and witnessed the capture of one of the bombers walking around this quiet neighborhood a year later, the tension still lingers. >> in a sense it seems like it was a year ago and in another sense it seems like it was just yesterday. >> reporter: it started with a killing of m.i.t. police officer sean collier leading to a car chase into watertown and a shoot-out killing one suspect. then a city-wide search for his younger brother. the focus -- the very heart of watertown. >> chief is advising all watertown eastern residents to remain in their homes.

>> it filled up. there was like 50 cop cars out here. >> the way they rolled in behind us, coming from both sides. >> we were scared of every civilian walking down the street. >> reporter: abby murphy pregnant at the time heard gunshots erupt outside her window. >> loud. blocks away? do i need to duck? a scary thing. we were trying to be really calm. >> one of the tactical vehicles. >> reporter: and hunkering down, sean murphy snapped photo after photo. what he captured through a lens, one of the biggest takedowns of a wanted man in american history leading to this home after a tip about blood on a boat. >> soon as i took that image i knew that this boy was very close and i knew that, really, i needed to find cover. >> reporter: s.w.a.t. teams risked their lives closing in on one of the men they believed was responsible. not knowing if the 19-year-old was armed or perhaps worse,

strapped with explosives. >> all of a sudden, this guy came up. >> reporter: what was that moment like? seeing him? >> this was a very dangerous, an act of -- a scene. it was good to know that this guy wasn't going to leave. >> reporter: he didn't leave. police ultimately pulled the suspect off the boat, pinning him to the ground ending a massive manhunt, and for the first time in days -- boston could breathe. >> this was over, at that point. >> a dangerous guy. he had done a lot of dangerous things and i think, really, a the that point, his eyes were wide open. i think he knows that his rein of terror was over. -- his reign's terror was over. still to come in the "newsroom," the hope for finding flight 370, a 15-foot long torpedo-like scanner. brian todd got a unique look at the bluefin 21. hi, brian. >> reporter: hi, carol.

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good morning. i'm carol costello. thank you so much for being with me. mission number two for the unmanned submarine searching the depth of the indian ocean will begin once again as the weather clears up. like all the other searches for flight 370 and its passengers, the first trip for the bluefin turned up nothing. the submarines 7.5 mission monday found no objects of interest plus the mission ended early when the submarine passed its maximum operating depth. there was that oil slick found

in the water by ocean shield over the weekend. remember? just now a sample from that oil spill is on another ship and heading back to australia for tests. for more on all of these developments, erin mclaughlin is in perth, australia. good morning, erin. >> reporter: good morning, carol. as far as we know, the bluefin 21 still aboard the australian vessel the ocean shield, bad weather preventing it from being put back into the water. we're also getting new details about that first mission that was cut short and lasted about 7.5 of the planned 20 hours. it only covered around 29% of the planned 15 square mile area. now, that 15 square mile area is significant. it's the area that officials have identified as the most probable place to find the black box, based on the data analysis from those pinger detections earlier. now, we understand that technicians aboard the "ocean

shield" have looked at the limited amount of data the bluefin 21 was able to capture during its time underneath the water, and no significant objects have been found. officials here in australia have long said, in is going to be a painstaking and meticulous process. nothing that happens under water is easy, especially water this deep. so it could take some time, carol. >> tell us more about the oil slick. they finally collected samples. how long will it take before they figure anything out? >> reporter: that's right. they collected about two liters worth of samples of that oil slick. we understand that it's currently on an australian military ship making its way to the western coast of australia. it will be brought to a military base by a chopper before being jetted out here to perth for more detailed analysis. we understand that it should arrive here in perth on wednesday. how long it will take them to analyze that, well, officials

here are not saying, carol. >> erin mclaughlin, reporting live from perth, australia. despite the bluefin's early return it is the best hope to find flight 370 and it is an amazing piece of technology. >> reporter: this is a very sophisticated underweather drone essentially. we got access to the operators who run the vehicle who acknowledge this is a difficult job for the bluefin but they say it's up to the task. its manufacturer calls it the bluefin 21, it's technically known as at autonomous underwater vehicle, auv. >> it's a spart torpedo. >> reporter: right now it maybe the best remaining hope for finding wreckage from malaysian airlines flight 370. we were given exclusive access behind the scenes at phoenix international, the company which runs the bluefin to see how it works. it may launch from the side of a search ship, the bluefin is operated by remote control with help from a satellite.

its job, not to listen for pings but to map the ocean floor and look for debris. to do that, it can use two different payloads, which have to be swapped out. >> this particular payload section is the acoustic section. >> reporter: first the bluefin uses side scan sonar and a multibeam echo sounders that bounce sound waves off the ocean floor that aren't natural. if picked up, the bluefin can be brought to the surface. the sonar technology is taken out and high-tech cameras are put in. >> it's a high definition black and white camera capable of three frames per second. >> reporter: together they can create a detailed mosaic of the ocean floor. the operators are confident if wreckage from flight 370 is down there, the bluefin will find it. >> the technology on the auv is good enough that we can resolve something that is, as small as a microwave, perhaps even smaller. >> reporter: but it's not an easy or fast process. it takes the vehicle two hours to dive to the bottom. 16 hours to search as a

15-square-mile section of the ocean floor and two more hours to return to the surface. then it takes another four hours to download and analyze the data collected. that means just one mission of the bluefin 21 takes at least 24 hours to complete. meaning the search could drag on. >> kgiven the size of the searc area, to take six, eight weeks. it's a weeks and months worth of problem to cover that amount of area. >> reporter: but as we've been reporting, the bluefin has suffered a setback in its first deployment. it had to abort the first mission. a source tells us the bluefen spent 7.5 hours instead of the 20 supposed to be deployed. 3.5 hours searching at the bottom, far less than expected. >> frustrating for searchers. >> reporter: absolutely. >> does the bluefin automatically go back up when it hits a sen democratth programmed in? >> reporter: you pretty much have it there, exact, carol. an official from phoenix international, which owns and operates the bluefin told us

it's designed to abort when the depth set is exceeded. if it drops below that the safety mechanisms kick in and return the vehicle to the surface. this official at phoenix international believes that's what happened in that first deployment. >> brian todd reporting live from washington. and one of the problems and tom foreman is in washington to explain this for us, is the searchers on the surface of the ocean don't know exactly what's underneath. so they can't really program this bluefin accurately all the time. right? >> reporter: yeah, carol. i was listening to what brian had to say there and what you said here. here's the thing. we keep talking about all of this from a distance, we're not out on the ocean out there. as if this is scientific and easy. it is scientific. it is not easy. in part because we know so little about this. the general area we're talking about -- the most shallow part is like a mile and a half. the deeper part, somewhere more than three miles, but we don't

know how much deeper, and where this thing may be located, these pingers down here, if they can find it, well, maybe that's somewhere in two miles. maybe it's three miles. maybe deeper. we don't know. we also don't know what the bottom is like, carol. we don't know how many ridges and hills are down here. we don't know if there is silt down here how deep the silt is and if things are buried in the silt. there are tremendous problems here, carol, and when you take even a highly technical piece of equipment and put it into an environment you don't know much about, it gets really difficult. and talking about the depth, remember the maximum depth for this device, this underwater robot, is around this three-mile level. what that means, you're already at the limits of its performance. which means there are always questions about this. this is a great piece of equipment, but it has been used much, much, much more up in shallower areas, like coastal edges, coastal embankments. that sort of thing. it's not been used nearly as

much as these very deepdepths. not that it can't do, but on the edge of performance. >> understand. days after a russian fighter jets buzzed a u.s. destroyer, vladimir putin calls on the united states to help prevent the use of force in ukraine. cnn pentagon correspondent barbara starr following all the developments for us. good morning, bash ra. >> reporter: good morning, carol. so is the russian military really taking on the u.s. navy? stay with us. i have low testosterone. there, i said it. how did i know? well, i didn't really. see, i figured low testosterone would decrease my sex drive... but when i started losing energy and became moody... that's when i had an honest conversation with my doctor. we discussed all the symptoms... then he gave me some blood tests. showed it was low t. that's it. it was a number -- not just me. [ male announcer ] today, men with low t have androgel 1.62% testosterone gel. the #1 prescribed topical testosterone replacement therapy,

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certainly sounds like something out of the cold war. russian fighter jet makes a dozen close-range passes over a u.s. navy destroyer in the black sea. in other words, the russians buzzed a u.s. warship repeatedly. the incident happened on saturday. it's being described by the pentagon as provocative and unprofessional.

let's bring in our pentagon correspondent barbara starr to tell us some more. what message did the russians want to send to the united states? >> well, you know, provocative and unprofessional might be just the most kind words that the pentagon has to describe publicly what happened on saturday. they think that moscow is sending them a message of harassment, to put it politely. you know, buzzing the "uss donald cook" in international waters, in the black sea, conducting operations well announced publicly, and this russian su-24 fencer fighter jet makes a dozen low passes around the ship over a 90-minute period. it was not armed. it didn't have missiles under the wings, but, still, this is not -- you know, this is so far from standard practice at sea, and there was also a russian frigate, another small russian

ship shadowing "the donald cook." so the navy sees it as harassment and a political message from moscow with tensions so high in that region over ukraine, but the fact is, the bottom line is, the navy says the pentagon says, it will continue to conduct the exercises and the training that it's conducting and it really wants the russians to back off. carol? >> now, we know that russian jet was unarmed. right? in the folks aboard the "uss donald cook" knew, too. thinking what that would be like to have a russian jet flying at what? 500 feet over my ship for 90 minutes? >> a really good point there. unarmed, no missiles under the wings but in these low passes, you're absolutely right. it flew about 500 feet off the water, and about 1,000 yards to the side. so, look, the ship knew, you know -- this airplane was not about to attack it, but this just isn't good seamanship.

p it's not good combat air practice or the way things are conducted. that's the point the u.s. is making. you want to send a message, do it diplomatically. you get this close between military forces, accidents can happen. things can happen. no one wants that, and this is not the kind of -- of venue, if you will, to send a political message. don't mess with warships. don't mess with fighter jets. you know? act the way you're supposed to act at sea. that's really what the pentagon is saying back to the russians, and that is why they are talking about it so much. they want moscow to hear them. >> barbara starr, reporting live from the pentagon, thanks so much. still to come in the "newsroom," hopes for finding flight 370 now riding on this underwater search vehicle. randy kay heads out on the water to see how the bluefin 21 does its job. that's just ahead. co: sometimes you don't know you need a hotel room

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>> reporter: sources tell cnn first officer feyerick hamid's cell phone was on and searching for service roughly half an hour after all of flight 370's communications mysteriously shut off, information cnn has learned that malaysian authorities first gave to the u.s. a while ago. >> it would be very rare, in my opinion, to have someone with a cell phone on in the cockpit. it's never supposed to be on at all as part of every checklist of every airline i'm familiar. >> reporter: sources say malaysian authorities told the u.s. that a cell forenear malaysia, roughly 250 miles from where the plane turned around, picked up a roaming signal from hamid's cell phone, suggesting his was the only phone turned on after the flight's traps ponder turned off. one u.s. official told cnn "he could have tried to do something with the phone. we don't know." >> the interesting thing about that no other phone connected to it just specifically his cell phone. >> reporter: while u.s. and malaysian officials caution there is no evidence the first officer tried to make a call

with the phone, on sunday, malaysia's transport minister did not deny the possibility. >> as far as i know, no, but like i said that would be in the realm of the police. and the international agencies and when the time comes, they will be revealed. but i do not want to speculate on that at the moment. >> reporter: when the plane first went missing, authorities said millions of cell phone records were searched, looking for evidence calls had been made from the plane but turned up nothing. still, if hamid's cell phone connected with the tower, it only adds to the evidence that the plane turned westward from its planned path and that the plane was likely flying low enough for a cell tower to pick up the phone's signal. >> so, it does make me think that perhaps it was a little lower than the 35,000 feet that we spec lated because of the fact it did make the connection. typically, there's not even time to do that but they were still high enough in which it just made -- just made the connection and there was no speaking or no long period of time.

>> reporter: and what this information doesn't tell us, according to u.s. officials, is a motive and who was alive and who was not at the time the cell tower deteblgtd the co-pilot's phone. also worth pointing out, the aircraft never had a cell phone system installed and again, want to reiterate, this information was shared by the malaysians with u.s. investigators and the malaysians could be privy to other information we don't know b pamela brown, cnn, washington. still to come in the newsroom, violent weather ripping across the country. a nasty hailstones topple trees from heavy winds, strong winds, i should say. a look at where the system is heading next. i'm m-a-r-y and i have copd.

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sure it's not a ton of snow but not something you would expect to see in april. yes decided to throw in hail, too. the massive storm system is moving across the country, also dumped heavy rain and hail in austin, texas. golf ball-sized hail was reported with wind gusts up to 40 miles an hour. in sparta, michigan, violent winds knocked over trees and took down power lines, cutting power to thousands. >> i thought this was quite a storm. first, i saw winds going back and forth every direction. then i saw hail going exactly dead south in a straight line. you go around, there's garages knocked over flat over there, windows blown out all over the place. it's nuts. >> it is nuts. march already went out like a lion. >> explaining what is going on, talking about two completely different types of air masses out there you are talking about the snow, right, then you have all this warm air down to the south. that is the reason we have the

severe weather threats out there, cold front, same guy, still pushing further across today. the severe weather is out there, norfolk, wilmington, a separate area. hanging out toward southern florida, northern parts of florida jacksonville and gainesville, do you have the risk for severe thunderstorms, straight line winds, saw a lot of damage from straight line winds yesterday and even hail. that's just one side of the equation. you mentioned the snow. look at this, so easy to see with the current temperatures. look how warm it is close to the eastern seaboard, look behind the cold front, look at the 20s and 30s, yes, the snow currently already falling, that is the story, the front continues to push off to the east, the cold air filling in. a lot of rain throughout the daytime, warmer throughout the day, right? temperatures drop overnight tonight, we are going to see more of this snow filling in, even in places like new york city, yeah, chances are you are asleep, 2, 3 in the morning, new york city, but there could be some flurries out there overnight tonight. what a difference in the beautiful temperatures, 70s we just saw a few days ago. the cold air overnight goes down by you, carol, down to the

southeast. those temperatures are expected to drop, which means, there you go affecting snow two inches, albany, burlington, another three inches. what toward believe. even some heavy rain totals, looking at rain throughout the day the overnight hours into the northeast, clearing out tomorrow. here comes the big story. all about the temperature drop. it was gorgeous. notice the eastern seaboard trying to hang on to some of the warm temperatures, all of that cold air, below-average temperatures filling in a good 20 below average. keep in mind, just two days ago, seeing 15 above average. take that, got it together, talking about 30 degrees of a temperature change in just about 48 hours for the northeast. no one is happy now, carol. >> no. but tomorrow, the next day, they will be better. indra peterson, many thanks. a street for sky watchers last night, a blood moon that came as a result of a total lunar eclipse. it is caused when the earth passes directly between the sun and moon. thousands flocked to the griffith observatory in los angeles to catch a glimpse but if you slept through it, missed

it on the east coast because of all the clouds, do not worry, three more blood moons expected to rise over the in ex-two years. the next hour of newsroom starts now. happening now in the newsroom, surfaced. the sonar sub's hunt, cut short. >> we just hit a deeper shot than we initially planned. the first mission aborted hours early. direct challenge, a russian fighter jet buzzing an american warship. >> the pog calling the 90-minute close encounter provocative and up professional. >> making 12 close-range passes. >> this, i think, is the most sort of direct challenge to a u.s. destroyer. >> as violent protests sweep across the country. hail storm. millions in the path of severe weather. >> the bigger story is this huge

temperature clash. >> temperatures plummeting 30 degrees. storms turning into snow. you're live in the cnn newsroom. good morning. i'm carol costello. thank you so much for joining me. the bluefin 21, that drone submarine, could be back under water at any moment now. right now though, the weather is too rough. searchers are eager to continue despite the fang the blue at this point's first mission surfaced early and turned up no new leads. the subdid scan the water 7 1/2 hours but had to resurface when it reached its maximum depth about 2 1/2 miles down. also this morning, the malaysian government announcing it will set up an international investigation team to unravel the mystery surrounding flight 370. also, an oil slick sample found over the weekend is now heading back to australia for testing.

we are in kuala lumpur with more on this. good morning. >> reporter: hi, carol. that's right. a lot of questions being asked as to what exactly will happen to those black boxes if and when they are found. and the acting transport minister here in malaysia saying that doesn't concern him, who takes custody. his main goal is to find out the truth. have a listen. >> i don't think it's important who gets custody, as far as i'm concerned. it is finding out the truth and to find out the truth, definitely, with to have review what's in the black box. so, there's no question. >> reporter: according international protocol it is the country which the plane bebelongs to that takes ownership and leadership of the investigation in this care of

course, maifrnl button police chief has come out and said is they don't have the expertise to open that black box and to read that data. they will be looking for outside help. remember, black boxes are made to withstand very extreme weather conditions like fire and rain and water. fanned these black boxes have been deep inside the indian ocean for something like 40 days then one has to be very careful in opening that of those black boxes and retrieving that data. we know the u.s., the uk and australia has the capability to do so but who exactly the malaysian authorities will be turning to help them read that data, these still unclear at the moment. carol? >> reporting live from malaysia this morning. so let's talk about that and also about the latest underwater search. cnn aviation analyst and former transportation department inspector general, mara schiavo

is here, rob mccal slum here too and former faa inspector david soucie joins us as well. rob, i want to start with you. the bluefin, this drone submarine had to scrap the mission on monday because the water was too deep but the bluefin has to go to the bottom of the ocean to find anything, right? >> >> designed to go to 4500 meters, operational threshold, if you like be. others that go to 6,000 meters and sonar arrays that go to 6,000 meter, but for bluefin, 4500 is the operational limit. >> so as long as it got down to its programmed depth, it automatically turned around and went back up to the surface, right, mary? mary can't hear me. can you hear me, mary? no, she can't. >> oh, yes, now i can.

yes. as soon as it did that it had to come back up, because it needed additional instructions, it said, well, look, i have reached my operational limit, now what do i do? basically went back up and said tell me more and fix me up and send me back down. >> and david, one of the problems, searchers, you know, on top of the water, they don't know the terrain at that depth in the ocean, so, sometimes they can't program that subexactly right. >> go ahead, david. >> as far as the programming goes, remember, this is an autonomous vehicle. and with an autonomous vehicle, it's got to make its own decisions while it's under the water, it's not like a robot, driving in it and decide to move it. it has to make its up decision and so it's a matter of programming those decisions in for that particular environment. >> rob, the weather is too rough right now for the bluefin to go back under the water and this leaves searchers, you know, i guess wondering if this oil

slick they found over the weekend came from the plane. that's what they are left with right now. that oil slick is being tested right now but could this seriously turn into something? >> it's incredibly unlikely. you know, at this stage of the search, we have to investigate every single possibility, but you have to remember that we think that the aircraft was almost out of fuel and so we would only be looking at hydraulic oil and perhaps the engine lubrication oil. and when you take oil to this kind of depth and you subject it to the pressure around the temperature that it will be subject to, it changes consistency and is unlikely to make it back to the surface and if it does, it's in such small quantities that it's up likely to be detected. but's got to be investigated. >> yes, it does. let's turn back to the investigation on land. mary, the co-pilot has drawn renewed scrutiny once again because his cell phone was

detected after that plane made the west turn. now, there's no evidence he tried to make a call, but it is strange. >> well, it is. i mean, the faa did a stud day while back, and this is, of course, in the united states and it was before the faa loosened the policy or -- allowed the airlines to loosen their policy on cell phones but they found on every given flight, 30% of the people probably left their cell phones on. of course, they were studying it to make sure it had no effect on the safety of the flight of the airplane. so you know, this could be, you know, forgetting to turn your cell phone off. it could be having a catastrophic problem on the plane and decreasing in altitude to try to get a cell phone tower and communicate or something nefarious. at this point, all we know is that the tower reached out to the cell phone and the cell phone to the tower and that's about t and where are the cell phones for the 238 other people on board? that's what i want to know. >> exactly, david. why weren't there -- i mean, passengers aren't that well behaved.

i know that from personal experience. >> you know, i do, too. mary and i talked about that this morning. so -- but with the cell phones, what confuses me a little bit is the fact that they -- what i think is happening here is they are getting focused on the pilots. that's what the investigation was. when you investigate one person or one investigation with one thought in mind, these all you look at. so it's possible that they have just found this and that they haven't or that they have already ruled out those other 239 phones. so as mary said, there's some more information here and as is typical with the information being released from the malaysian government, we get pieces and part bus don't get whole stories. >> so rob, the last question for you, so the search underwater appears to be quite frustratingsome it more likely we will find out more about what happened during this flight through the investigation on land, in your mind? >> you know, i think both -- both aspects are very, very

important. everything to date out on the -- out on the sea, out at sea, has been informed by investigative work on land or up in the sky via satellite. so, you need to follow both of these strands in order to try to get to where we need to be. we need to keep analyzing the data that we have. we need to keep looking for new data that we might not have discovered yet. and over course, we need to focus our operations out on the -- out on the ocean where we think the aircraft might have ended up. >> mary, ron, dave, thanks so much. >> thank you, carol. >> actually, stay right there i want to get to another angle we are covering. so don't go anywhere. and that would be the disappearance of flight 370 teachle us that even large commercial aircraft filled with all kinds of technology can simply disappear, we know that firsthand now, right? well, the faa is in the middle of a massive undertaking to change the way planes are tracked in the sky and it

announced the completion of a nationwide upgrade which will allow air traffic controllers and pilots to follow planes with greater accuracy and reliability. aviation and government regulation correspondent renee marsh is here to explain this more and then i will turn it over to our experts. take it away, renee. >> reporter: carl, this upgrade, it is all part of what's called next gen, been an ongoing effort for year, really meant to enhance and modernize our air travel system. part of this initiative is a state-of-the-art satellite tracking system that allows air traffic controllers to track plane's every move even more accurately. we should say radar in the united states is very good. it updates the plane's position every 4.7 seconds. however, this new satellite tracking would update the plane's position continuously. the other benefit is the satellite tracking system would work in situations where radar has limitation ises. for example it can track planes

over the gulf of mexico where you do not have radar coverage. but it -- the coverage is now with the disappearance of flight 370, could this kind of technology essentially prevent a plane from disappearing? here is the thing. the plane's transponder would still need to be on. if it is off, the plane would still disappear. and as you know, already said that flight 370's transponder was turned off, carol. >> to make it clear for our viewers, this new gps system, just to simplify things, the fa a's requiring planes to have them by the year 2020, is that right? >> right. so, here's the breakdown. we do know that some 100 air traffic controllers, they are already using the technology. in another five years, another 130 of the air traffic control towers will also be using it. and in another six years, all airplanes must have the equipment on board that would enable them to be tracked in

this way, carol. but again, the purpose of the upgrade isn't necessarily to prevent planes from disappearing, like flight 370. it's more so to make sure that air traffic control system is more efficient and prevent congestion in the skies, carol. >> all right. renee marsh, thanks so much. i want to bring bang our panel. so mary, despite what renee said, want won't this help us keep better track of planes and why isn't it in place now? >> absolutely help us keep better track of planes. remember, as we fly now and been flying literally since orville and wilbur, we fly on highways in the sky and basically planes have to get in line and air traffic controllers have to see them. next jen gets rid of the highway in the sky and run air traffic control through a series of satellites that literally will circle the globe. the planes will talk to the satellite. the planes will talk to each other and they can perfectly sequence their traffic in a way that a human being couldn't even begin to do.

but everyone has to have this quip. it's called a vsb. the system's costing $40 billion and the office of inspector general, my old office, says it is not going to be done until probably 2035. and then the air lines have to buy another $7 billion of equipment. here's the rub. congress and the faa have not required all planes to have this equipment, only commercial service airplanes. so, the whole point of this is to make seamless, accident-free travel, but we've got to make every plane have it and it will be additional equipment, decides a transrespond, avsb equipment. it's great stuff if we make it the law. >> if we make it the launch david, isn't it worth the money? >> oh, it's absolutely worth the money. >> is worth the money. oh, sorry. >> it is definitely worth the money. part of the rub, too is when congress, a lot of that money, they did have a lot of controls on how it was to be spent or how it was to be managed. at this point, the faa was, according to the general

accounting office, 13 years behind schedule and $5 billion over budget. so congress is now at a standstill with the faa saying, well, you fix this and we will give you more money and the faa says we can't fix it until we get more money. they are at the stand till still now. it is probably the biggest vancement in aviation history as far as safety and efficiency, airlines spend $15 balance year more in fuel now than they will have to spend during the implementation of next jen. >> mary, rob, david, thanks so much. still to come in the newsroom, the escalating crisis in ukraine maybe a turning point. ukrainian officials say their troops are heading east now. cnn's phil black is there good morning. >> reporter: hi, carol. it looks like the ukrainian government is getting ready to fight back. cnn team has seen a convoy of armored military vehicles heading into a region that has become a hot bed of separatism. we will have more on this after the break. ...and a choice

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a cold war style act of aggression by russia. a russian fighter jet made a dozen close-range passes over u.s. warship in the black sea. in other words, the russian but buzzed a u.s. destroyer repeatedly. in the meantime, the white house is describing this incident and a phone call between president obama and russian leader, vladimir putin, as frank and direct. that was the phone call, they were describing that you passover by the u.s. jet as unprofessional. of course, all of this is happening as ukraine sends troops to the eastern part of the country to tamp down on pro-russia protesters.

let's bring in cnn's phil black, on the ground in ukraine. also joined by cnn military analyst, general spider marx. welcome to both of you. >> thanks, carol. >> glad you're here. general, i want to start with you. so, that fighter jet buzzes an american warship 12 times. what do you think the reaction was on board that u.s. ship? >> clearly on the u.s. ship, there was complete discipline. they have very strict rules of engagement and the russian fighter maintained a certain attitude and approach that was not provocative. so the first rule of any military organization, whether its its i it's a ship or force on the ground, you have a right to protect yourself. the ship was able to gain good intelligence, just like the russian ship was able to gain intelligence about the u.s. navy presence in the black sea. >> what do you mean they were able to gain intelligence? what kind of intelligence? >> you see what type armament they have. you see the type of reaction

they get. they see whether they are -- they were lit up by their radar systems. so, it's a very precise dance that takes place. and let's be frank, this hasn't taken place in over 30 years. we haven't had a confrontation where we have looked at former soviet, now russian kilt, versus united states. so, it was an intelligence-gathering operation. but clearly, very, very provocative on the part of the russians. >> right. the pentagon called it unprofessional. was this sort of military taunting? is that what this was? >> sure. well, i don't know -- taunting is not a military term. clearly, it was provocative. but as i indicated, you do that to see what type of a reaction you're going to get. in this case, the navy was spot-on, disciplined, had very restrictive rules of engagement but were able to gather some intelligence. >> okay. i want to talk about what's happening on the ground in eastern ukraine right now and phil black is here to tell us. phil, we just got this video into cnn.

it's pictures of a pro-russian politician. he is speaking in support of these pro-russian protesters and you can see in here, yeah, he is getting pelted with flour as he speaks to a crowd in kiev, which is actually quite tame compared to the fact a ukrainian convoy is on its way east as well. are we at a turning point in ukraine? >> reporter: potentially. it certainly looks like the ukrainian government is looking to appear to make good on what have, up until now, been threats about the use of force against the pro-russian and separatist groups that have been occupying government buildings across the south and east of the country. the government has set deadlines, they have passed. nothing has happened. now today, the ukrainian government says that what it says is that anti-terror operation is beginning to take place in the south. now, what does that mean? our own cnn team in the south of the country has witnessed a convoy of armored ukrainian military vehicles heading toward

and around that region that has very much become the hot bed of this sort of dissent, where a lot of that occupation that control has been consolidated by these pro-russian groups. the intention of the ukrainian forces isn't entirely clear just yet. is this just a show of force to try to make some of these occupiers think twice about the buildings that they are claiming to be their own at the moment or is it just potentially the beginning of a more direct confrontation? there are no good moves for the ukrainian military and government here in this, because to allow the status quo, that is to allow the continued erosion of the authority of the central government in kiev. but to create a more direct confrontation where lives could be lost, blood spilled, that could give those russian forces just across the bored per, the tens of thousands that nato says are there, a possible pretext for intervening more directly in this region of ukraine. >> phil, i'm going to let you go your signal is unstable there.

got great information there. general marks, i want to ask you one more question, so, this russian jet buzzes the american warship and then president putin requests a phone call with president obama and he says, you know, you got to help me here, ukraine, keep the peace. mixed messages at best, right? >> oh, carol, this truly is a canard on the part of putin to assume that the united states and to call on the united states to take a leading role to resist what's taking place based on putin's provocations. putin has the authority right now, around he has the power, more importantly, to pull those forces back from eastern ukraine, let's be frank with each other, these are russian forces. this isn't organic. this isn't pro-russian separatists in eastern ukraine. they certainly could have been whipped up, but they were whipped up by russian forces. so putin needs to stop this activity and withdraw those forces. look, he has already annexed

crimea. sebastopol. he needs to pull out of eastern ukraine. we, nato, don't have any article v obligations with ukraine and putin knows that. he knows our hands are somewhat tied and gives him freedom of action we haven't about able to achieve. >> general spider marks, thanks for your insight. i appreciate it. >> thanks, carol. still to come in the newsroom, a year after the deadly bombings at the boston marathon, constituent stops to remember as it continues to persevere. to keep life balanced. i don't always have time to eat like i should. that's why i like glucerna shakes. they have slowly digestible carbs to help minimize blood sugar spikes. [male announcer] glucerna...

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it has been one year since the impossible happened in boston. terrorists struck the marathon, an event held peacefully and proudly for decades. and the seconds after those bombs went off, people risked their lives to help complete strangers and the days and weeks and months that followed, the city defined what it meant to be boston strong, overcoming grueling physical and emotional injuries, and of course, rallying around their teams. and their teams rallied around boston. world series champion boston red sox, the celtics and bruins. today, boston remembers the four people who lost their lives in the bombings and the police officer who lost his life as well, as well as the hundreds who were injured. there will also be a moment of silence at 2:49 eastern time, the time the first of those two bombs exploded at the race's finish line. joined now by courtney holmes, the senior lifestyle editor at "boston" magazine. welcome, court mis. >> thank you so much. >> i'm glad you're here. last year after the attack, your

magazine featured running shoes in the shape of a heart with the words "we will finish the race." the new cover simply spells out run with laces of a single shoe. last year's cover touched so many people. what's the message you want to send with this year's cover? >> yeah, i think, you know, with last year's cover, we went out and we sought shoes from runners who had run that race and did it all in about three days and year we knew that we had to have -- we wanted a response or to be able to reflect on last year's events and we just wanted to say that this is going to be the best marathon ever and that we are looking forward and we are excited to reclaim the race. >> i knowize look at that cover, i know you mean run the race, but it's -- boston's certainly not running away from anything. i've never seen a city stand up to evil so successfully as boston. >> yeah and you know, they expanded the field of runners

this year, so a field of 36,000 runners, participants, police are expecting 1 million spectators to line the streets about two times as many as there usually is. i think everybody will be out in force for the day and cheer on the runners and to remember the survivors and those that can't be with us and just to kind of say, you know, boston strong and come together as a city. >> you're running in this year's marathon. so, what will you be thinking as you run the route? >> well, first of all, i'm hoping for nice weather. that's first and foremost. but i think for me, i'm just excited to get out there and i really do think that its crowds are going to be out in force. i think that it's just going to be a really -- somewhat somber but also joyous -- super joyous event and just returning to boylston and returning to the streets and, you know, showing off our strength and solidarity, i'm really looking forward to t. >> i like the fact that boston seems to want to move on, they don't want to dwell on the pain, they just want to, you know,

live life as normal and i think that's great. >> yeah, it was interesting. this year, for the april issue, we went back to people that had given their shoes for the cover and we interviewed about -- i think 35 of them and just checked in with them and said how are you feeling this year? are you running? and i think, you know, except for maybe two, everybody was running again this year and we are so excited to lace up and get back out there and, you know, just trying to stay -- send a message that the events of last year can't bring us down as we look to get back out on the course. >> yeah. so what do you expect your time will be? what are you shooting for? >> we'll see. i ran a marathon in october and i did a 4:20. hoping around there would be great. just hoping to finish. and again, really enjoy myself out there. slap high fives with many people and just kind of look around and see all the city coming together for such a special day. >> well, good luck to you. thank you so much for being with

me. i appreciate it. courtney hollins. >> thank you so much. >> our special coverage of the boston marathon bombing anniversary continues throughout the day. brook baldwin live in boston beginning at 2 p.m. eastern right here on cnn. i will be right back. all stations come over to mission a for a final go.

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road construction, and gaping potholes. so with all that behind you, you might want to make sure you're safe and in control. ford technicians are ready to find the right tires for your vehicle. get up to $120 in mail-in rebates on four select tires when you use the ford service credit card at the big tire event. see what the ford experts think about your tires. at your ford dealer. the was a truly amazing day. without angie's list, i don't know if we could have found all the services we needed for our riley. for over 18 years we've helped people take care of the things that matter most. join today at angieslist.com good morning, i'm carol costello. thanks for joining me this morning. mission number two for the unmanned submarson. ing the depths of the indian

ocean will begin once the weather clears up. like the searches for flight 370 and the passengers, the first trip for the bluefin turned up nothing. the submarine's 7 1/2-hour mission found no objects of interest plus the mission ended early when the subpassed its maximum operating depth. for more on these developments, erin mccrosswalk lynn is in perth, use trail ya. >> reporter: hi. we are told nothing happens quickly waters this deep and with the bluefin's first mission cut short, that certainly seems tonight case. breaking overnight, u.s. navy officials say no objects of interest were found among the data downloaded from their unmanned underwater robot. this as the first mission was cut short. 7 1/2 hours into the mission, the bluefin 21 was forced to return to surface early.

it was expected to scour the ocean floor for deb british the whole journey lasting 20 hours but instead, the device resurfaced after officials say it exceeded its maximum operating depth of 14,800 feed feet. >> we just hit a deeper spot than we initially planned, just bring it up, reprogram it, shift a little bit away from that deeper area and adjust our search pattern. >> meanwhile, a new detail emerging, a u.s. official tells cnn the co-pilot's cell phone was on during the play and made contact with the malaysian cell tower. according to information shared by investigators. that cell phone signal reportedly detected about 30 minutes after the plane made that sharp westward turn, around the time the aircraft disappeared from radar. as far as we new york the bluefin 21 is on board the australian vessel, "the ocean

shield." bad weather is preventing them from putting it back into the water. carol? >> we know that searchers picked up an oil slick and a sample is on its way back to australia. do we know anything more? >> reporter: these right. the sample still making its way back here to the western australia -- currently on board a military vessel. taken to a base before, jetted here to perth for further around nal sis. we expect it to arrive here on wednesday, but so far, authorities not giving a timetable from when those test results will come back, carol. >> erin mclaughlin live from australia this morning. still to come in the newsroom, provocative and unprofessional, how the pentagon is describing what happened when a russian fighter jet buzzed a u.s. destroyer on patrol in the black sea. we will talk about that next.

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just days after a russian fighter jet buzzed a warship in the black sea, russian leader vladimir putin is asking for help with force in the ukraine. he spoke with president obama over escalating tensions there. putin's request comes at a critical time. troops are pushing east toward pro-russia demonstrate earth in ukraine. cnn's michelle kosinski is live at the white house with more. good morning, michelle. >> hi. this is the second time that president obama and putin have spoken in a few weeks' time, the last time was march 28th. president obama told president vladimir putin to put it in writing, your response to the u.s.'s demands for what needs to be done for different blow mattek solution to ukraine. the white house said that response never came but

yesterday, president vladimir putin called president obama and had this discussion. as always, when you look at what each side has said describing that phone conversation, it almost seems like two different calls. the white house said that president obama told putin that the situation -- he has grave concerns about the situation there. what he described as the russian government's support of those armed militants who have taken over these government buildings across the eastern ukraine, asking again that things be moved back, that the troops be removed to even the precrimea levels, but these warnings repeatedly, as we know, have changed virtually nothing and the situation keeps escalating. vladimir putin on the other hand, according to the kremlin, told president obama that it's -- it's the fault of the ukrainian government, the violence and the protests that have happened there. and actually called on president obama to use american influence to prevent further violence.

we know that we have these four-party talks coming up this week that will bring russia, ukraine, the u.s. and the eu together, their foreign ministers. and if there really is a diplomatic window still open as the white house keeps saying, it looks like that will be the time and police for t of course, what we want to know, did anything positive come out of this phone conversation that the white house called frank and direct? was there any real progress? these not exactly clear, although at first read, there doesn't seem to be any progress. and the last time one of these phone conversations happen, the white house said no. there actually was not progress. but we have more questions for the administration and hopefully, we will hear more detail about that call today, carol. >> all right, michelle kosinski reporting live from white house. i will be right bang.

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things are becoming much more tense in ukraine. the russian prime minister coat quoted in russian newspaper its today saying that ukraine comment brink of a civil war around that's frightening. and here's why we understand there is a convoy on the way to eastern ukraine, perhaps to fight back against those russian protestors that have been taking over government buildings. the big question here, whose really -- who's really to blame for the rest? nick payton walsh is riding along with one of the convoys in the donetsk region what does it

consistent of? >> a large number of support vehicles carrying paratroopers, one said he was from odessa but think it may be a unit out of the middle or eastern part of ukraine. not clear where they were headed. wouldn't tell us what their orders were, apart from their orders were changing, moving most of the time in eastern direction but also around to the north as well alongside roads not far from a main road that lead between two towns. they have been the focus of everyone's attention the past two hours. we were earlier at the scene of a violent takeover by pro-russian militants days ago where a police station was seized. we went back to that building and remarkably, the original police captain was inside, he spoke to us, putting the place back together. behind that we got the feeling

they reached some sort of accommodation with the pro-russian protesters. they said the police were with the people and asked whether or not that meant they were still with the ukrainian government following their orders and they didn't want to answer that question. so, a calm there, but that seems to have been shattered now, we heard reports from one witness inside that town speaking to us, saying that they have seen a plane, a jet fly over it and heard gunfire afterwards. been an awful lot of speculation on media what may have occurred inside there but hearing from a witness the possibility that troops most likely ukrainian troops have landed inside the airfield near that particular town. so a fast-developing situation here. i should add as well that russian media are quoting the de facto self-declared mayor of the town slightly north saying he believes the town he is in where he has been leading the last few days, a group of very pro-russian protesters, backed

pro-russian militants overtake certain buildings in there, the self-declared mayor believes they are now surrounded by ukrainian forces, concern sold siege may begin. i should point out, carol, a lot of misinformation flying around here but quite clear, given the armor we have seen on the move and reports coming from inside some of these towns that we may be seeing the beginning of the ukrainian military operations trying to re-establish authority in parts of these towns. >> nick peyton walsh reporting live from ukraine this morning. i will be right back.

the ebola virus, once found in remote areas of africa is spreading. the virus now reached the african country of guinea, specifically, the capital city where 2 million people live and work. the outbreak is only getting

worse. 112 people have died there in the last three weeks. cnn's chief medical correspondent, dr. sanjay gupta is live in guinea with a exclusive look at the fight to help contain this virus. >> reporter: you know, the numbers that you just cited, carl, they have gone up. this is not the news people here wanted. it's gone up 11 now new deaths just over the last few days. they are trying to get a handle on things here and that involves trying to identify parents, trying to test them, trying to isolate them. and that is challenging work. we are here in the capital city. life goes on here, carol. no doubt. but there is a real battle here. doctors trying to go out into these communities and trying to figure out, have any of the people here come in contact with somebody who might have had ebola? might they be at risk themselves trying to identify them early? never done anything like that in this country before. really in western africa before. so this is new, certainly a lot of the local doctors here on the ground here, carol. >> how are people there

protecting themselves? >> reporter: you know, i think the best way to describe this, there is a nervousness around ebola, the mysteriousness of it the lethality of it, but also a lot of information campaigns going on to remind people it's not airborne, not something that is going to live on surfaces so people out here in the community, while they are nervous and a psychological fear sometimes, there's little risk of actually catching it like this. it's when they go into the hospitals, it's when someone gets sick, that's when they become more contain joyce, it's really, i don't know how best to say it but staying away from sick people, not spending extended time with them. health care workers, carol, they don't have that luxury, 14 health care workers died from the beginning of this outbreak for that reason. dr. sanjay gupta live from guinea this morning, thank you. black to flight 370. weather permitting, crews will send the bluefin sub back into

the indian ocean for the search for the plane. the first came up empty. how does the bluefin 21 work? randi kaye went out to the boston harbor with the firm that makes the submarine to find out. >> reporter: on board the rv resolution in the boston harbor. we have come here to see for ourselves how the bluefin auv operates. >> they are the tool you would use to conduct a wide-area side-scan survey in deep water. >> reporter: bluefin robot innings designs and builds the autonomous underwater vehicles in quincy, massachusetts. if this were a mission, a real mission what it would it be doing? >> the next thing would happen, the radio instructions received to the red antenna there the vehicle say, okay, start this mirkts propeller would spin up and dive. >> reporter: here in the boston harbor, the water only 40 feet deep, easily manageable for the

bluefin because this autonomous vehicle is used to working in deepths several miles belet surface. the bluefin 21 can dive about 2 1/2 miles but flight 370's wreckable in the indian ocean may be deeper than that. it takes about two hours for the bluefin to reach the bottom, where it can operate for another 16 hours. it scans the ocean floor as if it's mowing a lawn, aye icing side-scan sonar, which identifies objects that stand out from the seabed. when it's working with the side scanners it is not actually taking pictures, right, it's measuring sound? >> it's actually converting sound to electricity and then turning that electrical value into numerical value, then turn it into an image a. >> reporter: when it returns to the surface, scientists download the sonar data to computers. the results may look something like this. >> looking at here, for example, this is a shipwreck in boston harbor, you can see how it's different than the area around it, you can see there's parts of

the steam engine right here. >> reporter: if something catches their eye, the navy will send down a high resolution camera on the bluefin 21. it can take black and white photos, covering about 15 square miles a day. it's a slow process, moving at just 3 nautical miles per hour. only made worse by horrendous conditions, freezing temperatures, mountainous terrain and complete darkness. but even diving blind, there is much hope the bluefin 21 auv will see something. randy kay, cnn, quincy, massachusetts. >> i'm carol costello. thanks for joining me at this hour. this hour with berman and michaela starts now. back-to-back obstacles in the underwater search for flight 370. the robotic submarine's first deep dive is aborted, cut short, due to the ocean depth. the return to