passengers being airlifted. >> that's the actual search area. >> that is one of the search areas. >> aboard an american supply ship in the hunt for flight 370. cnn giving you access like no other. >> you're here for the foreseeable future. >> it's a 24-7 operation. breaking news from ukraine. armed protesters taking over a mayor's office. russian president putin saying the country is on the brink of war. >> this amateur video purports to show ukrainian tanks and one local risking his life to slow their advance. america watching with laser focus. you're live in the cnn newsroom.

good morning. i'm carol costello. thank you for joining me. we begin with the dramatic rescue operation going on right now off south korea for nearly 300 people still missing after a ship sank, at least four people known dead. helicopter and boat crews have been on the scene plucking passengers from the fridge it waters. most of the people on board that ferry were high school students. wen rescued student said he heard a loud thud and then the ship started to list. he said everyone was ordered to put on life jackets and jump into the water. another student says he's afraid many of his classmates may still be trapped on board that sinking ship tr ship. >> translator: some of the students were not able to escape. the ferry started to list, so we asked if we shoulders scape now. the announcement kept telling us to stay still. i'm so worried about the other students in our rooms. >> the ferry left from the port

city of incheon and was headed for the resort city of jeju before going down in the yellow sea. water temperatures in that sea in the 40s. cnn's pauline choiu has more for you. >> reporter: a desperate rescue after a crowded passenger ferry suddenly began sinking off the coast of south korea. more than 450 people aboard the ferry, 325 high school students on a class trip to a nearby resort island. one student told the korean news network ytn, he heard a loud bump before the ship started to sing. shortly after the ship issued a distress call, helicopters and boats including a ship from the u.s. navy seventh fleet scrambled to assist the overturned vessel, rushing to pluck the passengers clinging to rails. these two passengers were lifted to safety in a helicopter basket, while dozens of others were pulled from the water by rescue boats. one passenger told ytn they were

told to jump into the sea as the ship began to sink. within hours the ship was almost completely submerged. only a small portion of the hull was visible above the water. the weather was clear at the time and authorities are still not clear on what caused the catastrophe. >> that was pauline choiu reporting. divers have been trying to get into the search to search for survivors, but they are struggling against strong currents. we'll keep you posted. right now the under water search for flight 370 once again under way. we're waiting for bluefin-21 to come back up from the sea after a technical glitch forced the submersible to resurface briefly. that would be the second setback in as many days. the submarine scouring the ocean floor as analysis from the first short earned mission this morning finds no debris. today some 14 planes and 11 ships continue their efforts on the surface including the navy's caesar chavez, the only u.s.

ship at the location. >> we got exclusive access to the only u.s. ship participating out here as the search heats up both above and below the surface of the indian ocean. an all-out push in the search for any scrap of debris from malaysian flight 370. >> that's the actual search area? >> that is one of the search areas. >> reporter: the skipper of the u.s. navy supply ship "cesar chavez," the only u.s. ship playing a role in the hunt for the missing plane. >> what like to be part of this mission that has gripped the world's attention? >> first of all, we're proud to play a part. there's many moving parts on this mission. >> reporter: another moving part in this search for debris, the highly sophisticated u.s. surveillance and reconnaissance p8. new video shows the plane in action capable of taking

high-resolution pictures over enormous areas and detecting tiny pieces of anything floating. australia's hmas, success is one of several ships investigating on the ocean's surface what the p8 sees from the air. now with the "cesar chavez" in play, the search on the surface and beneath it can continue non-stop. >> you're here for the foreseeable future. >> we're here as long as we're tasked by seventh fleet. it's a 24-7 operation. >> reporter: like a massive floating 7-eleven, the "cesar chavez" already taking on thousands of gallons of food and supplies before another thousand mile three-day journey to keep the searchers searching. miguel marquez, cnn, aboard the u.s. naval ship "cesar chavez." that ship will be leaving the

port just south of perth where it is to head back out to resupply the australian ships searching the surface of the ocean. it can easily switch direction and start assisting the ships searching under the water on bluefin that's gone down for the third time. it's down under the water right now last we heard. we expect if everything goes according to plan, they have had problems with it. it will surface in the very early mornings here in australia and then we will take about four hours to download everything they have there and see if they found anything. carol? >> miguel marquez reporting live from australia. joining me now mary ski ave. know cnn aviation analyst and rob mccallum, an ocean search specialist who led an expedition to the titanic wreckage. good morning to both of you. >> good morning. >> good morning. >> mary, bluefin-21 came up early today with technical problems, then went back down

into the water to finish its mission. i assume all is well? >> well, we can assume so. the fact that bluefin knows to come up when it has problems. what we wouldn't want to have happen is it damages itself in doing things it shouldn't be doing. so the fact that it keeps coming up and they retool it and send it back down, as long as it's working, that's a good sign. they are getting pictures. that's what they wanted. they want those sonar pictures so they can see what's down there. so far, so good. >> although the sonar pick tires have shown nothing of interest so far. but rob, we know the water is deep in the search area. a geologist told reuters that the sea floor is covered with an ooze, a kind of sludge. he says that's a good thing because any shiny object would show up clearly. do you agree with that? >> that's correct. the sea floor for north american

viewers anyway who have just come out of a winter, it's very much like a hard-packed snow with a light dusting of powder on top. for sonar searching, what you're getting is you're throwing sound out into the water and it's being bounced back off objects and returned to back, in this case bluefin. depending on what the sound is hitting, it gives a different kind of return. it will enable searchers to distinguish between the natural terrain, the mud if you like, and anything human made like aircraft parts. >> it's no surprise to you, rob, that nothing has been found so far? >> no. obviously the search controller is very confident in these pinger locations. they are deploying only one asset and they're focused very hard on these pinger locations.

so we'll see. it's a big area out there. bluefin is right at the edge of its operational limits. it's a wait-and-see game. >> mary, the air, the search by air for debris will soon come to an end, maybe come to an end tomorrow. is there any real reason it should continue? >> at this point anything -- any debris that did float has been so widely dissipated by the currents, it's far away from the location of the pings and, you know, there's no guarantee they would find anything if they kept going on because there's just no way of knowing where it could be at this point. it's taxing on all the assets, the resources and the personnel. soon, like i said, if bluefin can find anything down there, this mission is going to change dramatically. they need to be retooling and getting their assets in place to do that kind of a job which would be eventually a recovery operation. so, no, i agree with angus

houston. it's time to switch the focus and to concentrate on the under sea search. >> rob, you heard what mary said. the mission is getting taxing. in fact, it's been going on for 40 days now. the operation is also getting quite expend zich. listen to angus houston, the search chief. >> it's very expensive. and all of the countries that are contributing to this are running up big costs. i think the world community should be very appreciative to those countries for their contribution. >> this will probably go down as one of the most expensive searches in history. at what point, rob, do you think they should begin to scale back the operation? >> you know, not for a long time yet. i think that you'll start to see a throttling back on the search for debris, but i think that the under water search will continue

for a long time because there's an intense drive to solve this mystery, both from an aviation safety perspective on which the entire industry rests, but also because, as humans, we are mystified as to how this can happen. there's a lot of people watching this and a lot of people very interested in the outcome. >> rob mccallum, mary schiavo, thanks for your insight, as always. still to come in the newsroom, a country on the brink of civil war. tanks roll through the streets of ukraine. thousands of russian troops wait at the border. will the united states get involved, even more involved than it already is as in troops? we'll talk about that next. [announcer] play close-good and close.

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the struggle between ukraine and groups of pro russian supporters have the former soviet republic teetering on the brink of civil war. ukrainian troops have been spotted in towns and cities near the eat earn border of ukraine and russia, some supporting ukraine. this one was carrying flying russian flags. we've been getting in a lot of dramatic pictures, including these from a town in eastern ukraine about 100 miles from russia's border. this is a local risking his life to keep tanks from getting further into a town called slavyansk. this is amateur video. we can't confirm. it looks like the man tries to stop the tanks using his hands. then you see him laying down in front of the tank. as far as we know, he's okay. slavyansk is one of several towns seeing violence.

take a look at the map. up risings are taking place up and down eastern ukraine, all about 100 miles from where russian troops have amassed at the border between eastern ukraine and western russia. phil black is in ukraine. he has more. >> reporter: breaking overnight, ukraine fighting back as conflict intensifies. according to the ministry of defense, two ukrainian soldiers have been kidnapped by russian extremists. ukraine's acting president saying they have begun an anti-terrorist operation aiming to stop attempts to tear ukraine to pieces. for the first time ukraine is using military force. retaking an airport in the eastern done necessarying region after a reported clash with pro russian gunmen. the operation may continue here in the town of slavyansk where pro russian militants defied kiev's demand to give back

control over local government buildings. this amateur video reports to show ukrainian tanks and one local risking his life to slow their advance. it's unknown whether you crane will try to reclaim government and police buildings in@as many as ten towns in ukraine, seized by pro russian militants. new video shows pro russian protesters raising the russian flag atop this building in the done necessarying region and tearing the sign off the administration building. russian president telling chancellor ang ma la merkel that the conflict puts the nation on the brink of civil war. now nato is upping military presence amid the threat. >> we will have more planes in the air, more ships on the water and more readiness on the land. >> reporter: the u.s. still expressing concern about

russian's intention in ukraine says they're preparing a number of responses. >> we are prepared because of the authorities that we have in the executive orders the president signed to escalate sanctions and other costs if and when russia escalates its actions. >> phil black joins us on the phone right now. how much farther can russia escalate its actions, phil? >> reporter: well, potentially quite a lot. remember nato believes there are still tens of thousands of russian soldiers pretty close to the border with ukraine ready to move over. russia has always spoken about its willingness to intervene if it believes russian-speaking people's lives and rights are at stake. i think that's why there's some hess tans. we are seeing a big military presence from the ukrainian military but they're not moving

in, not confronting these pro russian militants and protesters because if they do, there's every chance it could escalate very quickly from that point. >> phil black reporting live from eastern ukraine this morning. as you can see, the crisis shows no signs of letting up. the situation could still deteriorate. that's according to retired army brigadier general mark kemmet. >> the word ukraine means border, just like in crow at, the criena is the buffer zone. this is putin's buffer zone between russia and the west. he wants to restore that buffer zone. he doesn't want europe up on the gates of russia. it's that simple and the fact that the europeans and the americans are afraid to stand up to putin i think in fact is going to cause things to be far worse than better. >> how do you stand up to vladimir putin. general kemmet says u.s. and

european troops need to go to ukraine as a show of force. it's the only thing putin will understand, says the general. sending in american troops is not a popular option. according to a poll, a majority believe ukraine is in our national interest. but just 7% think the united states should send in troops. so diplomacy is still in the works. secretary of state john kerry will meet with representatives of the european union. michelle kosinski at the white house. any word this morning? >> reporter: the president is traveling today in the u.s. we're not going to have a briefing situation where we can ask those questions that we've been able to ask over the last few days. there have been many clashes about exactly what you raise, what do you do here? for the past many weeks, the u.s. hasn't wanted to do anything that seems too invasive

into this situation. anything that would be too provocative. i think it was interesting that what we saw, we've been seeing this incremental moves and sanctions. it's not lost on people out there that this is kind of a quandary. it's easy to say why don't we put people there in terms of troops there, but what would really be the point of that, especially when putin has been making these outrageous moves? wouldn't that possibly escalate the situation even further? as you mentioned, it's a very unpopular move. so then what do you do? what the u.s. has decided are sanctions basically. we've been seeing those escalating as russia's moves have been escalating. but then the criticism becomes, well, we're reacting to what we don't want putin to do and that's what he then does. so what the u.s. is saying right now -- yesterday the administration spelled it out further that we don't want to provide lethal military aid to ukraine at this point, but we're not ruling out military aid in

the form of things like gear, night vision goggles, other elements like that that the white house doesn't want to spell out at this point. they don't want to parse out what they consider military aid and what they consider lethal aid where they draw the line. in terms of sanctions, the white house is now being more i would say possibly aggressive in saying that we are actively considering doing more. so what's the benchmark going to be? do we wait for putin to make another move? not necessarily. diplomacy has been the way to go here. there is that meeting tomorrow. the administration said without sort of clearly spelling it out, let's see what happens tomorrow, let's see how engaged russia really is in diplomacy before we see potentially more severe sanctions, carol. >> michelle kosinski reporting live from the white house this morning. still to come in the "newsroom," a new video shows al

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a disturbing video has surfaced showing what may be the most dangerous al qaeda members in years. the video shows al qaeda's top leaders in a brazen public meeting including the group's so-called crown prince. house intelligence chairman mike

rogers says this shows just how brazen the group has become. >> the al qaeda threat today is more diverse and more aggressive with more threats streams than we've seen since even before 9/11. the less pressure you put on them, the more they take that as a victory and believe they can get away with plotting, planning, organizing as you saw there, finance, training, all the things they would need to do to strike a western target, they're going through that process, including, by the way, bringing very sophisticated people to devise new devices to try to get around security protocols. >> cnn's barbara starr broke the story. she joins us with more from the pentagon. good morning. >> good morning, carol. 100 al qaeda fighters out in the open. it sure doesn't look like al qaeda on the run. it's the largest and most dangerous gathering of al qaeda in years, and the cia and the

pentagon either didn't know about it or couldn't get a drone there in time to strike. u.s. officials will not say. but every frame is being analyzed. in the middle, the man known as al qaeda's crown prince nas sir al wuhayshi, brazenly in the open greeting followers. a man who says he wants to attack the u.s. seemingly unconcerned he could be hit by an american drone. >> this is quite an extraordinary video, the leader of al qaeda in the arabian peninsula nasir al wuhayshi addressing over 100 fighters somewhere in yemen taking a big risk in doing this. >> in his speech, wuhayshi makes clear he is going after the u.s. saying we must eliminate the cross. the bearer of the cross is america.

u.s. officials believe the highly produced video is recent. with some fighter's faces blurred, some worry it signals a new round of plotting. >> surprised that such a large group is assembled together including the leadership and somehow they didn't notice. >> al qaeda in the arabian peninsula also known as aqap, is considered the most dangerous. the cia has repeatedly killed the leaders with drone strikes. the group now emboldened. >> the main problem is they now have bomb makers that can put bombs on planes without being detected. >> that bob maker is believed to be responsible for several attempts including the underwear bomber attack. >> that man, the master bomb

maker in yemen is one man that doesn't appear in the video. he is believed by the u.s. to be very much in hiding and there is great concern what role he is now playing and what he maybe up to next. carol? >> barbara starr reporting live from the pentagon this morning. thanks, barbara. to discuss the threat from al qaeda i want to bring in paul cruickshank. can you hear me? >> yes. >> that was a scary report. how concerned should we be? >> there's a lot of con serb about this group, al qaeda in the arabian peninsula, the affiliates in yemen. this is a group which has been resurgent over the last year, launched a number of attacks against army installations, security installations across yemen. the leader of this group, nasir al wuhayshi is the number two of al qaeda, appears to be

emboldened as well, appearing with 100 fighters. in this video he's greeting people freed from a prison back in february. this is a propaganda video from the group, but also a message for the united states, we're still coming after you, he's telling america. >> this is a big in-your-face thing to the united states. but it could be a whole bunch of nothing, too, right? >> it's a propaganda video first and foremost to show supporters around the world they're still in business, still a threat inside yemen and they still intend to target the united states. they still have some ability to target the united states because they do have this very skilled bob becamer, ibrahim, somebody inhiding who is heavily protected in the group and skilled at making explosives which you can get on airlines. so a lot of concern about this. back in february the department of homeland security issued a bulletin after u.s. intelligence

discovered that al siri was developing a new generation of shoe bombs. >> this gathering supposedly took place somewhere in yep men, right? is it possible that the united states actually knew about the meeting but we're not hearing about it? if the united states can target an al qaeda leader in the middle of a busy city in pakistan and then kill that person with a drone, why wouldn't it be able to detect this large gathersing? >> if they had known about it, it would have been a huge opportunity to decimate this group and land a huge blow against al qaeda globally. nasir al wuhayshi is expected to take over from the current leader. you have over 100 fighters there. their thought may be they didn't know about this either because they didn't have this sort of human intelligence capability, people inside the group that can inform them about this meeting which would have taken quite a

lot of time to organize or perhaps because they weren't able to intercept some of aqap's communications. this group has been more careful in the way it's communicated since some of these revelations have come out on the nsa over the last year, carol. >> paul krush shank, thank you for joining us. i appreciate it. thank you. one of the most expensive searches in aviation history. we'll break down the cost and the hunt for that missing plane.

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in the indian ocean search teams are awaiting the return of the bluefin-21 back under water after a technical glitch interrupted the vessel's hunt form flight 370. the redeployment comes after initial analysis of the submersible's data showed no sign of debris. today, some 14 planes and 11 ships continue their efforts on the surface. as the search chief says, only a few more days remain until that part of the mission will be completed. joining in the hunt, the navy's "caesar chavez," the only u.s. ship involved in the hunt for the missing plane. in the meantime passengers' families lost their tempers at a beijing briefing today. the families had been invited to a video conference with

malaysian officials in kuala lumpur, but the audio on the feed didn't work. after 20 minutes the families stormed out, some lying "liars" at the video monitor. with the search for flight 370 reaching the 40th day, there's word that costs are mounting in an operation that many officials say sun like any they've ever seen in the history of aviation. cnn's joe johns has more for you. >> reporter: the search for ml 370 is quickly becoming the most expensive of its kind in history, the scope of which is unprecedented says a former lead investigator for the national transportation safety board. >> in the history of aviation, we've never had a challenge that even comes close to this. >> reporter: more than two dozen countries, seven contributing the most and australia taking the lead. 80 ships and 61 aircraft all part of the effort to locate the plane. the greatest challenge? the remote distances of the

search. >> a tremendous percentage of the resources, whether aircraft, ships or personnel, are spending their time getting there and getting home. >> reporter: that comes with a hefty price tag with some estimates suggesting a cost of $21 million a month, most of the money coming from military training budgets, some from humanitarian organizations and now u.s. navy operations. for example, a navy p8 aircraft costs about $4200 to fly. the pentagon originally disseminated $4 million for the search but has already spent $7.1 million on planes, ships and underer water surveillance equipment. how does flight 370 compare to other aviation disasters in the two-year search form air france 447 cost roughly $50 million. the twa 800 investigation and recovery cost about $40 million. in 1996, one of the longest investigations the ntsb ever conducted. swiss air 111 which went down

off the coast of nova scotia in 1998, the search, recovery and vapgs took four years and cost $39 million. but what of the collateral costs of missteps and mismanagement of the investigation? >> frankly, the malaysian government has not handled this at all well, and that's clearly cost time and resources. >> that it has. that was joe johns reporting. i want to bring in cnn's brian todd right now. you've been doing a lot of reporting on this bluefin-21. i guess the more complicated the technology, the more expensive it is to run it, right? >> it certainly is, carol. these are not cheap machines, vehicles to run. none of this is cheap. we got a little more of a breakdown of what it costs for one specific part of this operation, that's the part we've been talking about, the deployment of the bluefin-21, the autonomous under water

vehicle being counted on to map the ocean floor for possible debr debris. according to christopher johnson, just for the u.s. navy's allocation for this particular part of the operation, they've budgeted $3.6 million for their part of this operation. that covers the deployment of the towed pinger locater which was previously used in the past few days, the deployment of the bluefin-21 over the past three days, ten operators on board the "ocean shield" and transportation for those operators and presumably the equipment to the region and back to the u.s. that's just what the u.s. navy has budgeted so far for this. but it, of course, doesn't factor in what the australians are spending for the deployment of the ocean shield and what so many of these other countries are spending on the broader operation, carol. we're just making down that particular aspect of it and what the u.s. navy's portion of it is as far as what they've budgeted so far for it. >> the navy own it is

bluefin-21, right? >> well, phoenix international actually owns it and the navy contracts with phoenix international to run the bluefin-21 and also incorporates phoenix's operators to run it. the navy basically leases it, pays company nicks to run the bluefin-21 and the towed pinger locater. a bit of a complicated scenario. phoenix actually owns the towed pinger locater. they didn't manufacture the bluefin-21, but they bought it, run it and own it. the navy contracts with them to run both of those vehicles. >> it is possible that searchers will have to move on to even better technology, right? >> it's possible. we have talked about this over the past couple days. there are other submersibles out there that can go deeper than the bluefin-21. there's a remus 6000 that has a greater depth capability. it can go 3.7 miles below the surface. that's a mile deeper than the bluefin. there's the orion that can go

significantly deeper, but that has to be towed. it's possible maybe one of those assets can be deployed. the navy says as far as the remus 6000 are concerned, they're put to use for military operations, essentially saying they're not available right now. the navy won't be more specific as to what they're used for. as for the orion, the navy tells us they have not been asked by australians to bring that to the region yet. >> brian todd reporting, thank you. rising tensions. tanks on the streets of eastern ukraine. tens of thousands of mugs troops mask at the border. is ukraine on the brink of civil war? we'll talk about that next. hey. i'm ted and this is rudy. say "hi" rudy. [ barks ] [ chuckles ] i'd do anything to keep this guy happy and healthy. that's why i'm so excited about these new milk-bone brushing chews.

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the russian president vladimir putin says ukraine is on the brink of civil war, this as tanks travel through ukrainian cities in the east, some supporting the government, others backing the pro-russia supporte supporters. william pom rans is with the woodrow wilson center and joins us live from washington. welcome, sir. >> glad to be here. >> in your mind, are the russians winning the propaganda war? >> well, i think russia's propaganda war is primarily directed toward russians inside russia and those russian speakers on the ukrainian borders. in that sense, i think the propaganda war is having some impact. there is in russia itself strong support for putin's actions. i don't think putin is winning the propaganda war outside those regions. >> it's important he win the propaganda war in those regions. i'll give you one example of why

it seems that russia is once again the propaganda master, so to speak. you go to prime minister dmitry medvedev's facebook page, he writes on the page or someone for him writes on the page, bloos has been spilled in ukraine. medvedev goes on to say he's urging ukrainians to decide their own future without imposter rouse nationalists and bandits, without tanks and armored vehicles and without secret visits by the cia director which is kind of unbelievable since russia seems to be destabilizing ukraine. >> yes. this is a standard tactic by russia. i think it's trying to cause to destabilize ukraine. it's engaged in a very intensive propaganda war and aimed at winning over the constituencies it feels necessary in order to continue the operations in eastern ukraine. that being said, i don't think it's being followed or supported internationally. you clearly did not have any sort of international support

for russia's actions in crimea. that followed significant propaganda from russia about its decisions to annex crimea. so i don't think russia really is winning at this stage any propaganda war. it's effectively directing that propaganda and that information to its own citizens. >> putin doesn't seem to care about what international entities think. general kemmet who served under george bush says, at the moment the united states and europe actually appear weak in the face of putin's -- i don't know -- strong propaganda war. he says putin needs to be shown who is boss. is that what he needs? >> well, the west needs to have a coordinated response in regards to the actions that are taking place in eastern ukraine. there is i think general agreement that we have tried to do it step by step. we are about to face a new step in this crisis. i don't have a lot of optimism

in regards to the meeting that will take place tomorrow in geneva. i fully anticipate that after that meeting the u.s. will begin to ratchet up the sanctions as well. that will be interpreted as weakness inside russia. there are consequences that can europe send troops to ukraine to protect the border, is that the answer? >> i don't think sending troops to the ukraine is the answer. it would simply pro vote russian troops to invade the ukraine. russian has their troops ready and it's right on their border. so i do not think that sending u.s. troops to ukraine would do anything other than provoke an immediate reaction from russia. >> we're back in a minute.

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>> reporter: at first glance it resembles a spacecraft. >> we have an array of light systems on the sub so you can turn on which ever light you need. >> reporter: jimmy nelson used to spend about 170 days a year on this sub, the johnson sea link submersible as it's known. it's now retired. >> all right. ready to go. >> ready to go. >> reporter: but other manned sea vehicles might be next in line to aid in the malaysia airline search. >> if this submersible gets to where the wreckage is, how effective do you think it will be in recovering the aircraft? >> very effective. >> reporter: like all research subs, it's slow. it only travels just over one mile an hour while submersed. it recovered some of the

wreckage from the ill fated shuttle. >> we have the capability of lifting around 1,000 pounds of weight to the surface. >> reporter: in the very front of the submersible, a tool called the manipulator, that does the important work of grabbing, scooping and sucking up samples that are recovered. this sub is about 24 feet long, it's also about 11 feet tall and weighs about 28,000 pounds. it has enough oxygen and emergency provisions aboard for people to survive under water for up to five days. there's also an aft observation area. it's only about 5 1/2 feet by 3 feet. >> this is how you're sitting, this is how i'm sitting. and you can be here for hours. >> reporter: but during those hours, this is what's taking place.

>> so we fire up the sonar system and it does a sweep, and it paints a picture as it spins around 360 degrees. if there's any solid debris on 2 bottom, it will give us a picture of what it looks like. >> reporter: the use of unmanned underwater vehicles is increasing, but in looking for wreckage, manned submersibles is an important capability. >> you can spot things that an unmanned submersible cannot spot? >> correct. >> reporter: this submersible will not be going, but others could be send into the indian ocean, under water, in an evident to solve a mystery. >> still ahead in the next hour of newsroom, a dramatic rescue still under way off the coast of south korea. more than 300 students still missing after their ship sank. more after the break.

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happening now on the newsroom, desperate rescue. >> more than 450 people were aboard the ferry, 325 of them high school students. >> the huge ferry sinking into the frigid waters in just hours. passengers being air lifted. >> that's the actual search area? >> that's one of the search areas. aboard an american spy plane in search of the mh 370. and breaking news from ukraine. armed protesters taking over a mayor's office.

russian president putin saying the country's on the brink of war. >> this amateur video, purports to show ukrainian tanks a disadvantage. >> watching with laser focus. >> if we win, russia escalates to it's actions. you're live in the "cnn newsroom." good morning, i'm carol costello. thanks so much for joining me. we begin this hour with a new search on the water a half a world away, with the united states providing help again. a rescue operation underway for nearly 300 people, most of them students, the ferry they were on sank in the waters off of south korea, triggering a massive sea and air response. a u.s. navy ship is en route to the area, some 164 people have already been rescued, but at least four are known to be dead.

one rescue student said he heard a loud bump and then the ship starteded to list. he said everyone was ordered to put on life jackets and jump. one student said he fears some of his classmates might still be aboard that ship. >> translator: some of the students weren't able to jump. i'm so worried about the other students in our room. >> the ferry left from the port city of inchon. water temperatures are in the 40s. paula chu has more for you. >> reporter: a desperate rescue after a crowded passenger ferry suddenly began sinking off the coast of south korea. more than 450 people were aboard the ferry, 325 of them high

school students from just outside seoul on a class trip. one student told the korean news network that he heard a loud bump before the ship started to sink. shortly after the boat issued a distress call, ship -- clinging to railings waiting for help. these two passengers were lifted to safety in a helicopter basket. while dozens of others were pulled out of the frigid water by rescue boats, one passenger told wtn, that they were told to jump into the sea, as the ship began to sink. within hours, the ship was almost completely submerged. only a small portion of the hull was visible above the water. the weather was clear at the time and authorities are still not clear on what caused the catastrophe. pauline chu reporting this morning. divers have been trying to get

so into the ship to search for survivors, but the ship is under water now. the hunt to find malaysia flight 370 goes on. it's now in its 40th day and officials are awaiting the return of the blue fin 21 submersib submersible. researchers fixed a problem and was sent back down. the blue fin had a very short mission on the first day after it went deeper into the ocean than its search par ram ters allowed. >> it's been told by the programmers not to go to a certain depth, not to do certain things, and the bottom just got deeper than it was supposed to there. i understand that it can go deeper, manufacturers are saying it can go a little bit deeper. a little bit past its rate of depth. so we have a potential to go deeper. but right now, it's doing what it's supposed to do. >> right now 14 planes and 11

ships continue their search on the surface looking for any kind of debris. joining in the hunt, the uss caesar chaves. you boarded that ship, what was it like? >> reporter: it's a massive supply ship that the -- on the surface of the ocean and below it is heating up. an all out push in the search for any scrap of debris from malaysian flight 370. that's the actual search area in. >> that's one of the search areas. >> captain roland belfont, captain of the only -- >> reporter: what is it like to be part of this mission that has gripped the world's attention? >> first of all, we're proud to play a part, there's many moving parts on this mission.

>> reporter: another moving part in the search for debris, the highly sophisticated u.s. surveillance and reconnaissance posieden air graft, capable of taking pictures over enormous areas detecting tiny pieces of anything floating. this is one of several ships investigating on the ocean's surface what the p-8 sees in the area. now with the "caesar chaves" in play, the search can continue nonstop. you're here for the foreseeable future? >> we're here as long as we're tasked by the 24th fleet. it's a 24/7 operation. >> reporter: like a massive floating 7 - ---three-day journ to keep the searchers searching.

now the caesar chaves is taking on fuel right now and food, it will head out in the next probably 12 hours or so, so they can resupply those ships out there. the blue fin 21 is down now for its third attempt at a full day of searching down at the bottom of the ocean. if things go according to plan, it should come up in the next 10 hours or so here, it's will take several hours to download that data and hopefully we'll have a read on whether or not it saw anything. joining me now, cnn aviation analyst and former managing director for the ntsb, and vice president and group general manager for teledine marine systems. welcome, gentlemen. >> good morning. >> good morning. peter the blue fin 21 came up early today with technical problems and then they sent it

back down into the water. i assume all the well? >> well, you know, this is a complex piece of equipment in a very challenging environment. it's the third mission down. you've got to expect it's going to take them a little while to fully get the thing operating to its full extent. and, you know, i didn't see anything unusual about this. once it gets going, it's going to do the job. >> thomas, we know the water is deep in that search area, but a geologist told reuters that there was an ooze, in other words it's covered in mud down there. but that means that any shiny object would show up clearly? >> the first thing to know, that sludge, that ooze, whatever we want to call it, a meter would

be a deep, deep layer. it's hard to know what's going on in that part of the ocean. but what you're looking is you're looking at a side scan sonar return. so you're looking at a bounce from an object. so when that sound wave hits that ooze--it's almost like what we call in radar, a corner reflector. it's quite objevious. so it does make the searching easier. >> is there any reason that kind of search should continue beyond tomorrow? >> i don't think there is. first of all, these guys have been working around the clock for over three weeks, and that's tough duty, it's tough on them, it's tough on the aircraft, i think the searchers have

realized that the opportunity to find the wreckage has passed, the combination of a slow start, and a tropical cyclone has just made it impossible. time to focus on the bottom of the ocean. >> and, thomas, that blue fin could be searching the bottom of the ocean for two months. this operation is getting expensive. at what point should they consider scaling back the operation? >> well, it's probably not something that i really have a good feel for. that's a decision that really is something that the community and the malaysian airlines needs to think about, but it does, you know, move to a fact that we really have not equipped the airplanes with the types of technology they need to be found in the deep ocean. the pinger technology, which is the cube where the airplane might be isn't designed to be te detectived after a long period of time. the pinger is most likely not

operational, and we have moved on to much more arduous search process with the blue fin 21. >> peter gold. thomas outschuler, we appreciate it. in public outdoors, it looks like they're having a lot of fun. it's very disturbing. how could this happen so publicly. we'll talk about that next. meatball yelling c'mon, you want heartburn? when your favorite food starts a fight, fight back fast, with tums. heartburn relief that neutralizes acid on contact. and goes to work in seconds. ♪ tum, tum tum tum... tums!

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it shows al qaeda top leaders at a brazen public meeting, including the terror group's crown prince. the outdoor event shows just how brazen the group has become. >> the al qaeda threat today is more diverse and more aggressive with more threat streams than we have seen even before 9/11. so we think that they're feeling empow empowered. the les pressure you put on them, the more they take that as a victory, the more they believe they can get away with plotting, planning, organizing, finance, training, all the things they would need to do to strike a western target. and they have new people that would device new devices that would try to get around security protocols in airports and other places. >> bob barrett is a cnn security

analyst. welcome, bob. how concerned should we be? al qaeda kind of posteded this on youtube, seems like it's a big middle finger to the united states. but does it necessarily mean we should be really, really afraid? how concerned should we be? >> i think there's a couple things going on, number one is the drone attacks have been pulled way back, there's obvious in pakistan, as well as yemen. there's been so much pressure that they're very, very selective. and apparently al qaeda has learned how to get around our intercept capabilities. in that gathering, there was no cell phones to pick up, they met very quickly in an act of defiance. and number three, as far as danger goes, yes, this is the most dangerous al qaeda group, they can get through airport security, they can get bombs on airplanes, and it's a question of where they're going to try

next, special command. >> you can see in that video, there are blurred faces, could that mean al qaeda is preparing an attack? what does that say to you? >> i think the leaders don't mind their face on television, but the rank and file operatives don't want their picture taken obviously. they're very media savvy, al qaeda now, they're more selective in atacks. which tells me they have free reign in yemen and they can plan another attack. >> al qaeda's top bombmaker does not appear in this video, does that say something to you that he would be missing from this meeting? >> not really. i think he's probably in hiding. he has the ability to take this

very high explosive called ptn and hide it. he's a technician, a very, very good one, and they want to protect him at all costs. so him showing up at a meeting like this one would have no point at all. >> al qaeda has not been successful since 2001? >> it's been fairly well defeated. i mean we're aware of the threat, and i'm not particularly concerned about it. it can maybe get a bomb through, but the fact that there's only been a couple of text attacks 2001. the growing possibility and the very possibility of civil war in ukraine. we'll talk about that next. [ male announcer ] this is the cat that drank the milk... [ meows ] ...and let in the dog that woke the man

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the struggle between ukraine and groups of pro russian supporters has the ukrainian republic -- some supporting ukraine, but others like this one, backing the russians. those are russian flags. we have been getting a lot of dramatic pictures, including these from a town in eastern ukraine, 100 miles from russia's border. you can see a local risking his life to keep tanks from getting

further in. we can't confirm it, but it looks like this man tries to stop the tanks with his hands and then lies down in front of the tanks. this is one of -- uprisings are taking place up and down eastern ukraine, all about 100 miles from where russian troops have amassed at the border. nick payton walsh is near a standoff. describe the situation for us. >> reporter: it's been a bizarre day in many ways, carol, i'm standing -- i hear an aero jet passing over me. we have been looking at the ukraine -- the last 48 hours, they have been emerging. b but here in this village -- have been driving heading towards an

airfield, which ukrainian troops took over yesterday. which you just saw in that video, almost putting themselves between these ukrainian armored vehicles and the path they were headed and now they're about 10 to 12 of them swamped by local citizens. they have kept them here for now, despite the fact that their commander of the ukrainian troops has asked them to leave, they have kept them here until the army -- a tense ukrainian soldiers, they said they just want to war carry on their way, perhaps go back the way they came. we have seen a local police chief come over and speak to

them. i'm now seeing over to one side, just about to drop behind a hill, a ukrainian helicopter circling as well. so it's clear there's you cukri military activity here. but the problem is when they move on the ground through local villages here, they run into these groups of residents that stop them in their tracks. to their credit, the ukrainian mill -- not continuing this so-called anti-terrorism operation. >> i just wanted to ask you a question about these residents, they do live in the town, because we always hear that russia puts crowds of people up to this kind of action. who are these people? >> reporter: for the most part, that i can see here, these are locals. there may be some who are

organizing this activity, but what i'm seeing around here are for the most part, angry local residents. this is an impoverished part of eastern ukraine. this may be based on misinformation. because a lot of pro russian information is -- there is severe reasons for them in their own minds to feel distrustful of kiev and that manifests in the disruption we're witnessing here. but it is peaceful, but it's not exactly what kiev wanted to see tight when they sent their most elite troops in. they're unable to move, because they're surrounded by angry residents who don't want them to be anywhere. >> hard to rescue people who don't really want to be rescued. i'm joined by christopher hill, he's the dean of international studies at the university of

denver and former ambassador to iraq, south korea and poland. welcome, ambassador. were you able to hear nick payton walsh's report? >> yes, i did. and that is a very common pattern, you move a u.n. convoy through the -- clearly these things are organized, but they are very much locally organized with some help from outside. and probably from the russians themselves. and it's also a very poor part of eastern ukraine and probably there are indeed people there who feel they would have a better economic future in russia than in a pure past of eastern ukraine that does not trust kiev. one of the narratives we have had is that ukraine wants to join the west, because that's where a better economic future

is, but in fact there are these parts of eastern ukraine, where they actually believe there is a better future with russian. >> but puts the ukraine in a tough spot. there's going to be a meeting tomorrow in geneva with all the parties. >> i think it's very good news that our president is in touch with vladimir putin, i suspect the conversations are not going very well. but i think it's very important to keep that communication. i think the second thing that's been very important is there has been remarkable solidarity among the european allies and europe union members with the united states. i think the issue ahead is the united states has a tendency to want to push for more sanctions, the europeans are not in that mode, so that is the kind of tension where the u.s. wants the -- my own view is there

needs to be continuation of the efforts that nato's been engaged in, which is to shore up the eastern flank of nato, make sure countries like poland, the baltic states really do feel like they're full-fledged members of nato. and i think nato is doing a very good job on that. >> -- they're allowing president putin to bully them. he suggests that the right thing to do in the near future is to send troops to that part of the world and that would show putin who's boss so to speak, do you agree with that? >> i'm very aware of what you reported today is that american people are not thrilled about sending additional troops to that part of the world, certainly not to the you can

ukraine. i think the u.s. and europe have done very well to stay together and certainly that has been noted by putin. could it be stronger? of course it could. but it's not so easy. it's easy in washington to talk about sanctions, it's not too easy in berlin to talk about sanctions. i think the administration has handled what i believe is a very weak hand and handled that very well i think. >> let's talk about arming the ukrainians because there has been some talk that the white house might do that. might that be a good idea? >> you know, i think when one looks at arming an army, you have to think of that as a long-term proposition. you have to look at that overall army that you want to equip, you have to look at how it's organized today, what kind of missions it might need, what is the status of the personnel, and

i think when you start looking at issues like that, you'll see that the ukrainian army, which probably can be a great army, but is not a great army for now and probably would not be a great army even with some u.s. equipment. so i think it's a long-term proposition rather than something that really could be helpful during this crisis. i think if the ukrainians want to fight, they're going to have to fight with what they've got. i don't think sending in, you know, rifles or even anti-air systems or things like that in the short run is going to make a big difference. i think we're really looking at what we have got today and the real question is not whether they have anti-aircraft weapons, but whether they have the will to fight. and certainly there's some indications that they do, but other indications that they don't. >> ambassador christopher hill, thank you for joining us me today, i appreciate it. >> thank you. coming up the search for

malaysian flight 370 -- there's a global humanitarian effort going on to find this missing plane, there is also a power trustruggle tha taking place that's pitting china against its neighbors, and some are claiming that china despite the massive effort could be doing more harm than good. we have got more after the break. [ male announcer ] if you're taking multiple medications, does your mouth often feel dry? a dry mouth can be a side effect of many medications but it can also lead to tooth decay and bad breath. that's why there's biotene. available as an oral rinse, toothpaste, spray or gel, biotene can provide soothing relief,

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many of those families of the missing passengers on board flight 370 are chinese and they have pleaded with their government to help solve the mystery. but the actions have led to increased scrutiny from their citizens and other countries. morning, suzanne. >> reporter: good morning, carol, you know the chinese had been criticized for first of all not doing enough in the philippine typhoon and the tsunami back in 2004. now the chinese government is making an aggressive search in the area. but -- more harm than good. it's a complicated role with chinese, not just because of its relationship with his neighbors and the united states. but also because of the mistrust from its own people.

as the worldwide hunt for malaysia flight 370 continues, the competition over two finds it first appears to be intensifying. for china, it's obviously personal. 154 passengers on the plane were chinese. but finding the plane is also in part about power and prestige. >> i think the chinese want to prove to their people and the rest of the world that they're a 21st century military with sophisticated capabilities. >> reporter: but some analysts are now opening asking whether the chinese government is doing more harm than good in it's efforts. in the first week of the search, chinese is releasing satellite photos it believed found wreckage. >> has found what could be a crash area for malaysia flight 370. it has released images of what appear to be large floating objects. >> reporter: those objects

turned out to be -- on april 5, china reported a possible ping from the chinese flight recorders. now some people are blaming the chinese for wasting time and resources in the search early on. tonight the chinese government is pushing back, after the "new york times" came out with this headline, suggesting chinese search efforts are hurting as well as helping. >> i think the point is the report is groundless and irresponsible. we express profound dissatisfaction over it. >> i just find that a little bit distasteful because i -- we can't have it both ways. there's enough frustration to go around that none of us have been successful yet in locating this area. >> reporter: just to give you some context, it's a time of

heightened tensions in the south china sea and east china sea because china has been accused bid the philippines and others over the disputing philippine islands. the three most powerful economies in the world, carol, u.s., china, japan, all in the pacific. so it's important to work together in the search effort to recognize that everybody has a stake in this. >> and it's hard to believe that china wouldn't kay about it's lost citizens, of course it does. by the same token, do some people believe there's something sinister behind china's alleged blunders? >> it's interesting because it's very consistent. analysts i talked to say they don't think there's anything sinister, sure, china has a long-term -- to simply prove that it's cableable of taking care of its own citizens.

be the more that china puts out those military assets to reveal who it can do, it also reveal what is it can't do. analysts i spoke to say it's surprising some of the vulnerabilities and weaknesses of the chinese military as well. #. still to come in the newsroom, does diplomacy have a chance or will civil war erupt in ukraine? and what's the next option for the united states? we'll talk about that next. mine was earned in korea in 1953. afghanistan, in 2009. orbiting the moon in 1971. [ male announcer ] once it's earned, usaa auto insurance is often handed down from generation to generation.

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they were on sank in the yellow sea while heading to the jaju island. at least four very known dead. a u.s. navy ship also even route to help. with thousands of russian troops assembling on the boarder of ukraine -- certainly not a popular option. a majority of americans believe ukraine is in our national interest, as many as 7% think it would be a good idea to send in u.s. troops. one retired army brigadier general thinks that might be a good idea. >> we stood on 25 years on the intragerman border defending europe against the communist block. we still have 30,000 americans in korea stopping korea from invading the south. there's no reason why a

reasonable preventative deployment of european and american troops in the ukraine wouldn't be seen by putin as a sign of deterrence and a sign of strength. instead what we show is weakness. we show vacillation, and the first thing we do is take, quote, the military option off the table. >> so diplomacy is still in the works so far. secretary of state john kerry meet with representatives from the ukraine and the soviet union. not many experts think much will come from that meeting. >> reporter: and there's talk about getting into some sort of standoff or conflict with russia. but there's been lots of criticism of what the u.s. has done, many calling it weakness, saying, why, if we're going to go the route of sanctions, because it's so difficult to come up with what that plan will

be anyway, that would be a deterrent to russia, and some say white not sweeping sanctions similar to what we saw after the soviet union invaded afghanistan, why not something tougher sooner? and we have not gotten that answer. it's more that the u.s. is working closely with european allies with their approach to this situation. and we know that europe has many more reasons to go gradually on those sanctions, the effects on the global economy and especially the european economy who does much more commerce, much more investment between europe and russia than the u.s. and russia. so the approach now is still diplomacy, yes, many people believe that it has been reactive. but the administration has been defending it, saying that there sill is a window for that diplomacy and really looking forward to as they put it, hope to these meetings tomorrow,

four-way meetings between russia, the ukraine, the u.s., and europe, that there will be some progress from that. so far, though, there has been no progress and even direct contact with russia, and nothing really has been moving. i think what's been most interesting in the last two days has been seeing ukraine now moving its military, we have been seeing the tanks going to those areas, no direct conflict of course at this point, but the u.s. has supported that, and it comes, mind you, right after cia director john brennan paid a visit over the weekend to kiev. so the administration has not wanted to come out and say we really support what ukraine is doing no,w, it's time to move perhaps. but when pushed, they say that russia has put them in this unten rabble situation and it's -- the ukraine at this point must do something.

>> michelle kos zinkos. dr. sanjay gupta on the ground in an effort to so much the killer virus. we'll talk to him next. yeah. i heard about progressive's "name your price" tool? i guess you can tell them how much you want to pay and it gives you a range of options to choose from. huh? i'm looking at it right now. oh, yeah? yeah. what's the... guest room situation? the "name your price" tool, making the world a little more progressive. why relocating manufacturingpany to upstate new york? i tell people it's for the climate. the conditions in new york state are great for business. new york is ranked #2 in the nation

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it's a deadly virus that kills nearly 90% of its victims. we're talking about the ebola virus. in the capital city of guinea, more than 112 people have died. dr. sanjay gupta has been on the ground following the fight on this virus. >> reporter: when you think about this scenario here, itit's a widespread virus. they have to identify the -- the health care providers are often doing this as incredible risk to themselves. take a look at what they have to do to get inside one of the isolation wards. >> you may not have seen images like this before.

these patients are fighting one of the deadliest viruses in the world. it has shut off their immune system, up to nine out of ten patients will dpi. buy this horror is isolated. we found traffic to still be busy here, markets are full. children, lots of children still smiling. you see, as scary as ebola ask, it's not easily today justice. people don't spread it until they are sick, really sick. when that is the case, the patients are not up walking around on the busy streets. they are down in bed, in hospitals or worse. even the dead are highly contain outside. >> dr. pierre rollin from thec d

cdc has helped track the virus for years. you see it all gets a small amount of virus anywhere on your skin to get an infection. >> nothing gets in, nothing gets out. >> reporter: it is one of the doctors without borders, he's from canada, he comes to these settlings for weeks at a time. he's not married, he has no children. that would be a job liability, he tells me. multiple pairs of gloves and masks, the head is completely covered. a multilayer gown, boots and then an apron. it's positively suffocating in the hot weather. preparing to treat a patient

with ebola is like preparing to land on the mean. but you're the only thing helping them sure view. they do this so the people outside these wards, the people on the streets will never know what it's like to be inside. you know, carol, there's something else as well that the local health care worker, the people who are going into these itsolation wards as well, have great risk to themselves as well. they can't even tell their own families the sort of work they're doing because they're worried that they'll be ostracized and stigmatized. the numbers, carol, have gone up a bit over the last few days. but a little bit of good news, the rate at which these numbers are increasing does seem to have slowed down. so it will be a month, to a month and a half before they make a dent in this. >> and those doctors can't express enough admiration, it's absolutely courageous for them to be there. and you too, dr. sanjay gupta,

thanks so much. thank you for joining me this hour, i'm carol costello. we'll be back after a break. when jake and i first set out on our own, we ate anything. but in time you realize the better you eat, the better you feel. these days we both eat smarter. and i give jake purina cat chow naturals. made with real chicken and salmon, it's high in protein like a cat's natural diet. and no added artificial flavors. we've come a long way.

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♪ sleep train ♪ ♪ your ticket to a better night's sleep ♪ a trip to resort island ends in tragedy in south korea, four people are dead. and almost 300 missing after the ferry they were traveling in capsized. it's happened again t rob robotic submarine comes up short. and al qaeda fighters meeting with one of their mostn. this is causing u.s. officials to be very, very concerned. hello, i'm christine