i'm brooke baldwin, live in a very rainy, windy, boston, massachusetts, for this afternoon for special coverage of an emotional and inspiring moment. i have to stand in front of you and tell you it is such a an honor and privilege to be back in this city today, live this however. the nation will mark exactly one year, down to the minute, when those two bombs exploded, not too far from where i stand here on boylston street. i'll speech with very special guests. also ahead, the massachusetts state trooper who got in a bit of trouble for releasing some pretty gruesome photos he took

in his official capacity the night of the manhunt, the night one of those young suspects was captured. he took me on a tour of watertown where that manhunt ended. so definitely, stick around for that. and a number, as i mentioned, a number of special people coming up live here in boston on this incredibly significant day. but other news we have to talk about here, the underwater drone, the bluefin-21, it is back in the water this hour diving to the bottom of the indian ocean. it is a plunge into uncharted territory. searchers are hoping its second mission will go a bit better than the first. that mission was stopped short after the bluefin reached its maximum depth forcing it to resurface. the 20-hour underwater expedition lasted all of six hours instead. >> it aborted its mission about the six-hour point. what this vehicle was programmed to do on this mission was main tan an altitude of about 30

meters above the seafloor. now, one condition that causes it to abort its dive is if it reaches its maximum operating depth of 4,500 meters, that's what happened in this case. >> the limited data from the unmanned sub has been analyzed, and nothing found. as for the question mark over who exactly handles those black boxes when and if they are found, malaysia is now promising to share any information that is retrieved from those black boxes. but they say custody isn't actually that important. >> 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 want to find out the truth. definitely we have to see what's in the box. >> what exactly does all of this mean as we go forward? let's go to the experts.

so, ladies, welcome to you. and mary, out of the gate, you get my first question. because again, malaysia's acting transport minister said it's not important who gets custody of those black boxes, hopefully once they're found. what does that sound like to you? does it sound like he's willing to hand them over? >> i think he's laying the basis to allow australia to lead the investigation, including through the downloading and the interpretation of the black boxes. australia's one of four nations that can do it. i'm sure they will also call in -- well, boeing's already a party to the investigation. because they manufactured the plane. so it sounds like he has -- that malaysia has realized this is going to be a cooperative effort. and it's in everybody's interests, especially malaysia's, to be very transparent about it. and hopefully they will be. >> hopefully they will indeed.

bobbi, this thing could have been underwater for 20 hours, it only lasted 6 hours in that first mission. as its first go, is that fairly typical? or less than expected? >> well, hi, brooke. hey, this is good. and i have known captain matthews for years. he is the u.s. navy's supervisor of salvage. he's a great guy, and a smart guy. the rest of his team out there from phoenix are the experts. and they put the bluefin in. they gave it a run of six hours. it wasn't the whole 20 hours. they pulled it out. they read the data. well, they didn't pull it out, it came back out, it worked the way it was supposed to. it got deeper than it's supposed to. its safety device sent it back up to the surface. they took it out, analyzed the data. it didn't have anything on it. so they didn't wait for the whole 20 hours before they put it back in. they turned it right back around, programmed a new search

area, got it right back in there. the beauty of the bluefin is, you can't wait for daylight, you can get it back in the water right away. they got it back in the water and they're not wasting any time. it's back in there doing its job. that is very, very good. >> exactly right. back in the water as you pointed out. just to remind people, the bluefin has this incredible ak crass sonar, so hopefully when and if they sense something large, they pull it up, pop a camera on and take some pictures and analyze that. bobbie, are there parts of the ocean -- this is an inkresably massive area, unprecedented depth, are there parts of this ocean that could be too deep for this? >> oh, absolutely. we do not know everything we need to know about that part of the indian ocean. and there could be parts of that ocean that are deeper than the 15,000 feet that the bluefin is capable of searching.

and if that's the case, then they do need to get another piece of equipment out there. if they cannot find what they're looking for in less than 15,000 feet, they're looking at all the high probability areas in the search area. but if they determine that it's too deep for bluefin, there are other pieces of sonar equipment that they can send out there. there are several pieces that are tethered that will go up to 20,000 feet. then they'll have to bring that out if they exhaust all the other areas. >> okay. so that could be plan c, d and e, depending on what, if anything, the bluefin hears. mary, to you. much attention has been made to the cell phone, the co-pilot cell phone that we know was turned on during the flight, after that jet, you know, lost contact. since we're just learning about that now, let me throw this at you. would it be possible -- because we know there were many, many passengers on that plane, a lot of passengers presumably had cell phones as well -- could

they have been on their phones? >> yes. and i think that that's a really important piece of information. we need to hear from the v investigato investigators. was the cell phone on all the time, and were there any pings off the cell phone towers from takeoff from the time they crossed back over malaysia in the left-hand turn? and if that's the case, did other passengers' cell phones get a signal off of the cell phone tower, too? or if it's a situation where if that cell phone only got a tower hit after the left turn, then you might -- one might surmise that something happened in the cockpit, and the co-pilot turned his cell phone on after that. j so forgive me, i'm not trying to be obtuse, but mary, i thought weeks ago, in the thick of this whole thing, we were told, no, nothing was found with the passengers' cell phones. are you telling me now there could be information that could be gleaned? >> well, you know, we seem to be

getting information dribs and drabs, and we've had lots of information that we were told, no, there's no information. now there is information. what you have to understand is there's no central repository. a lot of people think after all the snowden release, there's some big government repository of all the cell phone data. what the investigators in malaysia would have had to have done is try to identify passengers' cell phones, then go to different cell phone providers, get the records of their cell phones, and then also from the towers where they know they got pings, get the records of what cell phones went there. so it's a pretty big investigative effort. and i just am suspecting maybe they haven't done that entire investigative effort. it's not a -- there's not a one stop shopping to get cell phone call records. you have to do a lot of gum shoeing, and it takes a bit of time. >> okay. what are we now, five, six weeks into this? hopefully they're looking into that. thank you both so much for your expertise.

just ahead here, i will speak live with a man who found the black boxes, and found the wreckage of another famous plane crash in the indian ocean. hear what he did once sonar detected a large image. plus, back here, in boston, one year after those marathon bombings, the state trooper who is no longer with massachusetts state police, got in a little bit of trouble for releasing pictures to the public because he and a lot of survivors were offended by a certain "rolling stone" cover of a younger suspect. he took me on a tour of the manhunt in watertown. you will see and hear exactly how it all went down.

welcome back. i'm brooke baldwin live here in a windy, rainy boston, massachusetts, on such an important day here, where one year ago, this very hour, not just one, but two bombs shattered the joy and excitement of such an amazing race here. the boston marathon. the finish line, all of 50 feet away from where i'm standing here on boilsston street. this is a day of tribute, culminating in about 20 minutes at that race finish line. and so we will bring you -- i'm not going to be talking, we will just stop and pay tribute to the moments of silence, the flag raising as we've now learned

will be from an officer who was hurt in the shootout. we will see him raising that flag after the church bells chime, after the moments of silence, we will take that live here on cnn. as we wait for that, let me just take you back, one year ago, to the manhunt for those suspects, and introduce you to former state police sergeant sean murphy. he is the one who took the photos as police closed in on a bloodied jahar tsarnaev in that boat. how could we forget. months after the attacks he allowed the photos to go public. he did it because he was mad. he wanted to counter what you see here on the cover of "rolling stone," he and so many other survivors, families, bostonians who were offended by what they considered was a far too flattering photo of the younger suspect. so his decision to do that forced his eventual retirement from massachusetts state police. but talked to him yesterday, asked him again, asked him, do

you have any regrets, he said, not at all. he's never slept more soundly in his life. the police finally cornered the younger suspect in that boat in a backyard in watertown. you would never in a million years picture what happened here. >> could be anyone's neighborhood, could be any neighborhood anywhere. >> retired sergeant sean murphy, a photographer with the massachusetts state police, saw the entire siege, and witnessed the capture of one of the bombers. walking around this quiet neighborhood just 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. >> it started with the killing of m.i.t. police officer sean collier, leading to a car chase into watertown and a shootout, killing one suspect. then a citywide search for his younger brother. the focus? the very heart of watertown.

>> advising all residents to remain in their home. >> i would say there were 50 cop cars out here. >> the way ne rolled in from behind us, they were coming from both sides. >> we were scared of every civilian walking down the street. >> abby murphy, pregnant at the time, heard gunshots erupt outside her window. >> is it blocks away, do i need to duck? it's a scary thing. >> it was one of the tactical vehicles -- >> as watertown hunkered down, sean captured through a lens one of the biggest takedowns of a wanted man in american history. it all led to this home, after a tip about blood on a boat. >> as soon as i took that image, i knew that this boat was very close. and i knew that really, i needed to find cover. >> 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. >> what was that moment like, seeing him? >> this was a very dangerous, an active scene. it was good to know that this guy wasn't going to leave. >> 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, at that point, his eyes are wide open. i think he knows that his reign of terror was over. >> sean will be one of the 36,000 runners next monday. it will be his first marathon. he is running, and honored to be running for the martin richards foundation. martin richards was 8 years

young when he was killed a year ago today. once again, live in boston, just down a way from me at the finish line, we will pause in a matter of minutes, 2:49 p.m. eastern time, to be precise, the moment of that first explosion here on boylston street. the crowds braving the wind and rain to mark this moment that is so significant. but beyond remember, healing and then racing on monday. we will mark those moments live here on cnn. so stay with me for that, for sure. coming up next, though, a fascinating guest. back in 1987, a south african airways jet crashed into the indian ocean. sonar picked up the image of a large object, and the man tasked with determining whether that was the wreckage or not, finds the black boxes. he can walk us through exactly what he saw, how he found it, and how maybe we could be seeing this hopefully soon in the indian ocean once again. don't miss it. i'm beth... and i'm michelle. and we own the paper cottage.

it's a stationery and gifts store. anything we purchase for the paper cottage goes on our ink card. so you can manage your business expenses and access them online instantly with the game changing app from ink. we didn't get into business to spend time managing receipts, that's why we have ink. we like being in business because we like being creative, we like interacting with people. so you have time to focus on the things you love. ink from chase. so you can. ameriprise asked people a simple question: in retirement, will you outlive your money? uhhh. no, that can't happen. that's the thing, you don't know how long it has to last. everyone has retirement questions. so ameriprise created the exclusive.. confident retirement approach. now you and your ameripise advisor can get the real answers you need. well, knowing gives you confidence. start building your confident retirement today.

[prof. burke] at farmers,we make you smarter

about your insurance,because what you don't know can hurt you. what if you didn't know that taking pictures of your belongings helps when you have a claim? or that farmers offers a policy that will replace your car with a new one if it's totaled within the first two model years. and that parking near a street lamp deters thieves? the more you know,the better you can plan for what's ahead. talk to farmers and get smarter about your insurance. ♪ we are farmers bum - pa - dum, bum - bum - bum - bum♪ [announcer] call 1-800-470-8504 and see how much you could save.

welcome back. i'm brooke baldwin. we're live in boston. you're looking at many, many boston strong, standing at the boston finish line of the marathon. we're about 20 minutes away from the moment that first bomb blasted on boylston. they will be pausing, we will all be pausing for a moment of silence. some church bells in the area will be chiming. a flag will be raised. so we will stay with this, and we will bring that ceremony to

you live, as soon as that happens. but let's talk about this plane. what a lot of folks don't know is this. flight 370 would not be actually the first airliner to vanish into the deep indian ocean. in fact, a little history lesson. taking you back to 1987, south african airways flight 295, it was a boeing 747, headed from taiwan to johannesberg, a fire broke out near the end of the route and the plane went down just about 130 miles northeast of mauritus. some 16,000 feet in the ocean there. very much in the ballpark of where flight 370 could be lying. and yes, they found that plane. at least parts of the plane, with a submersible. it is a fascinating story. have a quick look. >> then one year to the day after it disappeared, the helderberg is found. from a depth of 4,400 meters, the submarine sends back images

that could only be the wreckage of south african flight 295. >> possible lessons for the search for flight 370. so roy led the effort to get the sub messible three miles below the surface and ultimately join that wreckage. he joins me live from tampa, florida. roy, welcome. >> thanks for having me. >> so, we have the news today from australia, that this bluefin-21, this submersible actually had to resurface after going as deep as it could, not quite reaching the ocean floor. i know you some years ago had a similar situation. and you had to make adjustments to your submersible. can you tell me about that? >> yes. well, you know, we didn't have the benefit of using an aob like is being used today. so the searches were made with

side scan sonar, towed side scan sonar. and luckily, we had a wreckage field, floating wreckage, so we pretty much knew where the wreckage field was. so the side scan sonar was deployed, and the limits of the wreckage field were determined, so that a documentation plan could be made up for an rov to go and film the wreckage, to determine which pieces needed to be recovered. >> so you were able to find the wreckage of flight 295 long after the pings from the black boxes ran out, because that could be the situation with flight 370 right now. how did you do that? and how long did it take you to find that wreckage down on the ocean floor? >> well, there was different circumstances.

marisius is in the northern indian ocean, and it's fairly remote. so we had to put a large vessel together with all of the appropriate search equipment, and salveage equipment. so it took three or four months to put that equipment together. we pretty much knew where the wreckage field was, because the -- there was floating wreckage on the surface. so the time delay for us to get there was purely logistics. actually getting out on site with everything we needed. >> the big difference, obviously, what you just pointed out, we do not have debris or wreckage floating on the surface. it's interesting what you said a moment ago, so you're saying your situation was more remote, more remote in the indian ocean than the one in which they're dealing with today? >> well, in the sense that marisius is a tiny island, doesn't have any resources,

nothing anywhere near what australia has. but at the same time, there wasn't such a large search presence there, because they had been talking to the aircraft crew until they were 100 miles from marisius. so they virtually knew where the plane had crashed. so it was fairly easy for them to go out with search aircraft, find the wreckage, and that pretty much pinpointed where the plane had gone in, and it was fairly easy for the subsea portion of the search to locate the wreckage. >> fairly easy. can you tell me, because initially when you or the submersible, what, saw this, you thought it was a large object. how did you finally connect the dots and decide, yes, this was at least a piece or pieces of the plane? >> well, the first search was

conducted with side scan sonar. and we quickly located what looked like a unique debris field that was totally different from the surrounding seabed features. so once the sonar had located the debris field, it was then sent lower, so it could take high-resolution data back to the surface. and the limits of the wreckage field were established, which allowed technicians and surveyors to impose a grid, a search grid, an electronic search grid over that wreckage field, and then we would deploy the rov to actually swim amongst the wreckage, document it with tv and digital still photography. >> it can be done. it can be found, even in the

much unknown indian ocean. roy truman, thank you so much for coming on. and just ahead, the people who control our skies. how to determine exactly how to never let a situation like this happen again. also ahead here, ukraine says an anti-terrorist operation is under way right now. as forces circle a pro-russian city. so, is vladimir putin about to make a move as tensions rise? [ male announcer ] eligible for medicare? that's a good thing, but it doesn't cover everything. only about 80% of your part b medical expenses. the rest is up to you. so consider an aarp medicare supplement insurance plan, insured by unitedhealthcare insurance company. like all standardized medicare supplement insurance plans, they pick up some of what medicare doesn't pay

and could save you in out-of-pocket medical costs. call today to request a free decision guide to help you better understand what medicare is all about and which aarp medicare supplement plan works best for you. with these types of plans, you'll be able to visit any doctor or hospital that accepts medicare patients... plus, there are no networks, and virtually no referrals needed. there's a range of plans to choose from, too, and they all travel with you anywhere in the country. join the millions who have already enrolled in the only medicare supplement insurance plans endorsed by aarp... an organization serving the needs of people 50 and over for generations... and provided by unitedhealthcare insurance company, which has over 30 years of experience behind it. ♪ call today. remember, medicare supplement insurance helps cover some of what medicare doesn't pay. expenses that could really add up.

these kinds of plans could save you in out-of-pocket medical costs. you'll be able to choose any doctor who accepts medicare patients. and there are virtually no referrals needed. so don't wait. with all the good years ahead, look for the experience and commitment to go the distance with you. call now to request your free decision guide. this easy-to-understand guide will answer some of your questions and help you find the aarp medicare supplement plan that's right for you.

welcome back. i'm brooke baldwin live here in boston. i have to tell you about ukraine. a dicey situation unfolding in the eastern part of that country. take a look for yourself. because you will see, here they are, ukrainian national guard troops send to oust pro-russian militants from buildings they seized last week. some are facing resistance. so, newly conscripted national guard troops are apparently being harassed by pro-russians as they move toward cities where other pro-russians continue to occupy buildings in defiance of kiev. now, keep in mind here, russian forces are poised just outside of ukraine, with moscow warning ukraine's government not to harm pro-russians.

one false move, and this tense situation could become explosive. more on that a little bit later. but the disappearance of flight 370 highlights the need for better ways to track planes. so the federal aviation administration, the faa, announcing a major upgrade to the next generation transportation system. air traffic controllers could better track our aircraft and pilots have more access to information in the cockpit. so to washington we go to cnn aviation correspondent renee marsh. explain some of the changes. are some of the upgrades already in use? >> yes. some of the upgrades are already in place. and i should tell you, this is all part of what's called next gen. it's been in the works for years, and intended for aviation to be safer and more efficient. the faa is using satellite to track aircraft instead of old ground-based radar systems. radar systems we should tell

you, they upgrade the aircraft's position every 4.4 seconds. the satellite systems would aircraft the aircraft continuously. and the more precise information would allow controllers to better control aircraft in the air. satellites can also cover areas where radar is limited, such as over the gulf of mexico, as well as in mountain valleys. so naturally, brooke, the question is, could this sort of satellite tracking system prevent a plane from disappearing, like malaysia flight 370. we've been asking experts this all day. and i have to tell you, it is very unclear, and uncertain, even with the upgrade, we do know that the planes would still have transponders. if someone disabled the transponder which is alleged to have happened in flight 370, one aviation facility told me the satellite would lose its ability to track the plane. however, there are others in the industry who say antennas would make it possible for satellite to continue tracking the plane, even if the transponder is off.

so we're getting mixed messages here. keep in mind, this system was designed to make air traffic systems more efficient. not necessarily to prevent a plane from disappearing. but the point is, this is years away from being 100% complete here. and it is clear that even people who are in the know aren't quite sure that it would actually prevent another plane from disappearing, brooke. >> clearly they need to figure this stuff out. rene marsh, thank you. we'll watch more of your reporting at 5:00 eastern here on cnn tonight. coming up next, minutes from now, again, i'm live in boston, an emotional silence will be covering the city. live pictures as people are lining boylston street for the moment, at 2:49 p.m. eastern, a moment of silence will be observed, raising of flags and church bells chiming. and we will all pause, and

remember what happened one year ago today. all stations come over to mission a for a final go. this is for real this time. step seven point two one two. verify and lock. command is locked. five seconds. three, two, one. standing by for capture. the most innovative software on the planet... dragon is captured. is connecting today's leading companies to places beyond it. siemens. answers.

i dbefore i dosearch any projects on my home. i love my contractor, and i am so thankful to angie's list for bringing us together. find out why more than two million members count on angie's list. angie's list -- reviews you can trust.

xfinity watchathon week was the biggest week in television history. but just when you thought it was over... what now? with xfinity on demand you can always watch the latest episodes of tv's hottest shows. good news. like hannibal... chicago fire.... ...and bates motel. the day after they air. xfinity on demand. all the latest episodes.

all included with your service. it's like hi-fiving your eyeballs. xfinity...the future of awesome. one year ago today, the nation started hearing a new way to describe how americans rise up and unite in the face of terror. two words, boston strong. on april 15th, 2013, two bombs went off, 12 seconds apart, near the finish of the boston marathon. three people died that day. 8-year-old martin richard, 29-year-old crystal campbell, and 23-year-old lingzi lu. 264 people were injured, with at least 16 of them losing a limb. and m.i.t. police officer shawn

collier was killed in the pursuit of those suspected bombers. we have the photos all coming together. look at this picture here. no doubt, what is on the minds of the faces you see here, is playing out throughout this great american city here. especially right here. i am feet from the finish line. these are pictures from the heinz convention center, just a couple blocks from the finish line here in boston. a special ceremony has been under way to remember those who were lost, and to recognize really what's been gained one full year later. >> today marks one year from when our lives were changed forever. >> boston strong, a simple phrase with a not so simple meaning, became our uniting call. >> boston strong is about the triumph of community itself. >> you'll hear the song of

promise. when lights dim, the cameras go away, know that the support and love will never waiver. whatever you have to do to carry on, know that the people of boston, i was right there by your side. >> let april 15th be a day when we all work together to make this world a better place. >> when i'm told of the 36,000 people lining up to start the marathon, you will send a resounding message around the world, not just to the rest of the world, but to the terrorists, that we will never yield. we will never cower. america will never, ever, ever stand down. we are boston. we are america. we respond. we endure. we overcome. and we own the finish line!

>> vice president wrapping up his ceremony not to long ago. people remembering exactly what happened one year ago. one woman carrie wagner created a prayer canvas in his travels all across the country. now she just told me signed by 100,000 people, including the house and the senate. speaker of the house, several professional sports players. carrie wagner joins me now. and also boston firefighter sean o'brien. he knows the family of the youngest victim killed. welcome to both of you. can we just notice for a minute, as i'm standing here looking at you, i can't help noticing all the people gathering behind us in the cold, in the rain, this is a tough town, lieutenant. they're not going to let a little rain keep them back. >> bosston is a big city, but it's a small town. we all know each other in some form or fashion, today and a

year ago. >> one year ago you were working detail. >> yes, ma'am. >> you were not too far away from where we were standing now. you heard the first blast. you were one of the heroes who ran toward it. tell me what you did. >> i told myself, i could jump the fence. we managed to wade through some of the wounded. and we got to the second blast site, maybe within a minute or two. the beauty of it, the strange beauty of it, there were already people helping. there were firefighters there, engine 7, ladder 17, engine 33, ladder 15 had responded from the a.r.m. of fire, at the first box. so people were helping immediately. the entire scene was cleared in 18 minutes. and i don't know the nuks, but i was at that within 35 minutes the most critically injured people were prepared for surgery.

amazing effort by everybody. >> amazing, but the pause on this conversation, just take a listen to what's happening here live here on boylston street. ♪ when the storm clouds cover ♪ all across the sea ♪ let us wear our allegiance to our land that's free ♪ ♪ let us all be grateful ♪ as we raise our voices ♪ in a solemn prayer ♪ god bless america

♪ land that i love ♪ stand beside her and guide her ♪ ♪ through the night with the light from above ♪ ♪ from the mountains ♪ to the prairies ♪ to the oceans white with foam ♪ ♪ god bless america ♪ my home, sweet home ♪ god bless america ♪ my home, sweet home

>> ladies and gentlemen, at this time, we ask that you join us in a moment of silence. >> thank you.

[ church bells chime iinining ]

♪ o say, can you see by the dawn's early light ♪ ♪ what so proudly we hailed at the twilight's last gleaming? ♪ ♪ whose broad stripes and bright stars through the perilous fight ♪ ♪ o'er the ramparts we watched were so gallantly streaming? ♪ ♪ and the rockets' red glare the bombs bursting in air ♪ ♪ gave proof through the night

that our flag was still there ♪ ♪ oh, say, does that star-spangled banner yet wave ♪ ♪ o'er the land of the free ♪ ♪ and the home of the brave? ♪ [ applause ]

[ bagpipes playing ]

[ bagpipes playing ]

>> as we stay on these live pictures, of so many out here in the wind and the rain on boylston street, to pay their respects and remember one year ago in these moments, the smell of smoke, the sounds of sirens and screams. lieutenant sean o'brien was one of those responding to the

screams. these two guests will be joining me as we watch some of this continuing to play out on such a significant day for the city of boston. carrie, to you, you have created this prayer canvas. 100,000 signatures strong. it's been out by the finish line. it will be in boston common, it will be at fenway. why did you care so much to do this? >> i thought it was important to show the resilience and the compassion, and the unity of the people of america. and we wanted to create a giant symbol that would show that. we wanted something everyone could participate in, regardless of age. and i think everybody wants to do something. they just don't know what. >> lieutenant, you're standing here and watching all of this with me. people, some of whom on crutches, the old, young, all coming out. you were out, you responded, you rushed toward the second explosion site. your little girl, ava, one of martin richards' best friends, and here you were, a tragic

irony responding to the very location where this little boy lost his life. one year later, how are you? how is your daughter? >> we're doing well. we're doing well. we're sticking in there, one day at a time. and if you notice, if you're able to see some of these survivors we're looking at now, their strength, and their endurance and their stick tu itiveness. >> what do you want people to know about the great town? >> i want them to know we're not victims. we refuse to be victims. when push came to shove, we stuck together. i don't think a lot of the parts of the world are like that. but in boston, we may nhave the sibling rivalries on occasion, but on that day we all worked together. and along with hundreds of civilians that stuck around and helped. like i said earlier, we were

able to clear that scene in 18 minutes. the most critically injured people got help within that -- well within that golden hour that trauma surgeons talk about. >> lieutenant sean o'brien, and kari wagner, thank you for your love for this city that is boston. i appreciate it very much. >> thank you. and we continue on live here in boston. i'm brooke baldwin. we'll take you back to the significance of this day, of course, feet from the finish line of the boston marathon. but right now, the underwater drone is hunting for any trace of flight 370. search crews today moving the search area for the u.s. navy's bluefin after the first mission had to be cut short. the bluefin forced to resurface early, after reaching its maximum depth.

the total underwater mission lasting just six hours. compare that to the projected 20 hours it apparently was capable of. >> it aborted its mission at about the six-hour point. what this vehicle was programmed to do on this mission was maintain an altitude above the seafloor of about 30 meters while can it conducted its sonar search of the area. >> now, the limited information from the unmanned sub has been analyzed, with no sign of debris. so to perth, australia, we go, to cnn's will ripley. and will, do officials there -- we know the bluefin is back in the water, but do they consider the six-hour mission a setback? how is their confidence level? >> reporter: well, certainly anytime you have a mission that only completes 29% of its work before it has to abort, that's not necessarily encouraging.

but look, what this shows is just how little we know about this remote corner of the indian ocean. the fact that we don't even know how deep the water is, in some of these areas that the bluefin-21 is going to be searching. this device is a pretty remarkable piece of equipment. it has a three-mile fail safe before the pressure becomes too much for the bluefin to handle before endangering equipment. the fact that it went down that deep, and the water was even deeper, too deep for the bluefin could handle, could be concerning depending on what the terrain is in the area. if most of the area is above the 4,500-meter threshold, the bluefin will be able to do its job. but if it encounters water deeper, and has to abort up, that could be a potential issue. i asked angus houston here at the press conference here in perth, whether they would need to deploy more assets to the area. he said, right now, this is the only technology available. the search of aircraft looking

for debris wrapping up in a matter of days, with no piece of the plane recovered so far. all of the hopes right now are pinned on the bluefin-21 as we have some uncertainty whether it's up for the full scale of this job. >> we'll have to see as it's back in for mission number two. will winley, 3:00 in the morning there in perth. thank you. specialist rob mccallum joins me from seattle, and david suesy is in new york. welcome to both of you. let's kick this off talking about the bluefin, rob. as i mentioned a second ago, we know that this submersible is back in the water, you know, trying mission number two. first attempt, will said, only managed 28%, 29% of the full capacity of that mission. and we have nothing so far when it comes to possible wreckage or anything about the plane. so should we be disappointed? or is it pretty typical in go

number one? >> i think what we've seen is a teething issue, i think. once the device is reprogrammed, then things will run a little bit smoother on the second run. but i am concerned that, you know, this auv is operating at the very edge of its operational parameters, which doesn't bode well, because we are not very clear on the ultimate depth of the search area might run to. so we don't have a lot to play with here. we don't have any redundancy. we only have the one auv on site at this time. >> that's news to me. i was wondering if we were throwing all resources. so one of these things looking for possible wreckage, looking obviously for the ultimate goal of the black boxes. do we know, rob, how deep this can go? >> well, when you look at what

the information is available at the site, it sort of runs from the high, you know, two and a half to 2,800, all the way down to over 5,000 meters. the bluefin is rated to 4,500. it may be possible to squeeze a little more out of that. but, you know, ultimately we probably would prefer to have a 6,000-meter rated asset on site. >> david, we know potentially, presuming at this point that the battery life on those pingers is gone, using the bluefin, but still so much is unknown. i keep going back to so much of the indian ocean there on the ground, the topography is unknown. is there even an effort to map the ocean floor here? >> you know, rob might be better to answer that question. but from what i've talked over the last few weeks about this, i've gotten quite an education about it, really.

but from what i understand, there's just no maps available right now. typically with this bluefin, they've told me that they have a map to start with. they kind of have a feel for what the depths are and they can map it out from there. but in this case, i'm not aware they have any maps to do that from. >> rob, let me ask you that question, can you map the ocean floor in this part of the world? >> yes, it is possible to map the ocean floor anywhere now. you know, there are tools around that can provide information down to full ocean depth. but there hasn't really been a requirement in history to do this. humans have really only been interested in this kind of information down to maybe 100 meters or so. because we're primarily interested on hazards to navigation. we want to know what bits are sticking up that ships could bump into.

now that the oceanography is science driven, there is a drive to go deeper into the ocean, and there are the tools that are available, and will increasingly be available to do that. >> david, search teams say that the surface search by planes and ships is nearing its end. it's been a month. >> they've probably exhausted it. there are a couple of options. one is that it's so spread out they're not able to find it, or they're looking in the wrong area. and the other is that the aircraft actually went down in substantial size pieces in which cases there would be very little debris and nearly impossible to find, especially at this late date, after the wind and weather that's gone through this area. i think it's a smart thing to just hold off on that. most of the clues are going to be found under the water. the ones that were floating, you know, from an accident investigation point of view, the real clues as to why this

happened are going to be found in the bulk of the wreckage which would be underwater, not what's floating. >> a lot of hopes it sounds like pinned on this one bluefin used with the sonar to find hopefully the black boxes. rob and dave, thank you both so much. coming up next, it has experts, like so much of the story, scratching their heads. the co-pilot's cell phone turned on after the jet lost contact. was his the only cell detected? we'll talk about that, and the passengers' cell phones. all eyes on vladimir putin as ukrainian troops surround a pro-russian city. what is putin's next move as tensions rise? i'm brooke baldwin here in boston on the one-year anniversary, a day of remembrance. ♪

♪ [ male announcer ] you're watching one of the biggest financial services companies in the country at work. hey. thanks for coming over. hey. [ male announcer ] how did it come to be? yours? ah. not anymore. it's a very short story. come on in. [ male announcer ] by meeting you more than halfway.

it's how edward jones makes sense of investing. but with so much health care noise, i didn't always watch out for myself. with unitedhealthcare, i get personalized information and rewards for addressing my health risks. but she's still gonna give me a heart attack. that's health in numbers. unitedhealthcare. means working efficiently. working together and a lennox home comfort system may just be the perfect example. its air conditioner works together with the furnace,

and that works together with the air purifier, and that works with you by saving you up to half off your heating and cooling bill. call now to get up to 1,700 dollars back or special financing on select lennox home comfort systems. offer ends june 13th. plus download our free lennox mobile app with an energy-savings calculator. ♪ if your current system is 10 years or older, start planning now and take advantage of special financing. so call now to get up to 1,700 dollars back or special financing on select lennox home comfort systems. offer ends june 13th. and download our free lennox mobile app. ♪ lennox. innovation never felt so good.

welcome back. i'm brooke baldwin, live here in boston, on this one-year anniversary of the bombing. but really, it's a moment for everyone to take time, remember, reflect, and honor those. meantime, investigators trying to determine the significance of that signal picked up from the co-pilot's cell phone. this happened near malaysia, suggesting the plane was low enough to connect with a cell phone tower. brett larson is here with me now. so, brett, last week, two senior sources involved in the investigation told cnn that there was information, some data that suggested this plane dropped to between 4,000, maybe 5,000 feet.

is this how low you have to be flying to pick up some sort of cell phone tower connection? what does this mean to you? >> yeah, you know, this is a significant development, brooke, and it's odd to me that it took them so long to pass this information long. they kind of sat on this for the 40-plus days we've been learning more and more about this. the way cell phones work, and a lot of us have probably done this, if we've been on a plane, we've forgotten to turn off our phone and you get in flight and you maybe glance down in your bag and you see your phone is on. it may or may not have a cell phone signal. that's the critical point here. because cell phone towers are, by design, they're only going to give you coverage for anywhere from one mile to a few miles. for them to have dropped down to that lower altitude, and then gotten that signal, it does beg the question, if they did that on purpose. >> right. so that's one question. second question is, correct me if i'm wrong, i felt like weeks ago when we were talking about

passengers' cell phones, i thought we were told nothing really came of that. we have these gpss, or that there were not even any pings. are you telling us that they maybe could get information from passengers' cell phones that might not have been in airplane mode? >> and that's a great question. and it also, to me, it seems completely unbelievable, that on a flight of more than 200 people, that only the co-pilot's phone was left on. this is the person who goes through a checklist before that plane is pushed back from the gate. and part of that checklist is to turn off your cell phone. it's not part of the checklist for the passengers. we are told to do it, but many of us either forget that we even have it on us, or it's somewhere we're not really able to get to it. i find it odd that it's just the co-pilot's cell phone that pinged on the tower. and what we don't know also is -- and they're not telling us this -- is if he attempted to make a phone call. so far the sources that have

told cnn is that, no, he wasn't in fact trying to make a call, just that his phone was picked up on that handshake as soon as they find a tower to talk to. >> what kind of information could investigators get, if they do determine that there were, i don't know, if ping is the right word, but passenger cell phones had communicated with towers? >> it would definitely tell us that either the passengers left their phones on, or that the passengers were trying to turn their phones on to communicate. in a really quick way that they could figure out whether they were left on, and this includes the co-pilot, is going back to the airport where this plane took off, and seeing the cell phone towers that are in the path of that takeoff, in the flight path, if you will. and if any of those towers on that path got that cell phone signal, and did a handshake with that phone, then it's very easy to conclude these were just things that were left on and

this is really just another blip on our radar as we research this story. >> okay. brett larson, a lot of good questions still. thank you so much, sir, for joining us, as far as the cell phone issue on that plane. more of our special coverage. cnn spoke with the manufacturer of the robot looking underwater right now. we'll show you what happened. as the city of boston here, a very rainy, windy boston here, marks one year since the attack at the city's marathon finish line, just down the way on boylston street, the healing here in this really special place. we're talking about the red flags that were missed, including a misspelling on a security list. stay right here. you're watching cnn's special live coverage. long, olive garden's 'buy one, take one,' starting at just $12.99. enjoy dinner tonight

and take home a second entrée for later. choose from a variety of amazing entrees, like new creamy citrus chicken. then choose a second favorite to take home, get dinner tonight and take home a second entrée, free. buy one, take one, starting at just $12.99. get it before it's gone. at olive garden, "we're all family here." discover our entirely new pronto lunch menu starting at $6.99. marge: you know, there's a more enjoyable way to get your fiber. try phillips fiber good gummies. they're delicious, and an excellent source of fiber to help support regularity. wife: mmmm husband: these are good! marge: the tasty side of fiber. from phillips. how much money do you think you'll need when you retire? then we gave each person a ribbon to show how many years that amount might last. i was trying to, like, pull it a little further. [ woman ] got me to 70 years old. i'm going to have to rethink this thing. it's hard to imagine how much we'll need for a retirement that could last 30 years or more. so maybe we need to approach things differently,

if we want to be ready for a longer retirement. ♪ because the more you know, the more we can help you. cut. lower. shave. chop. and drop your insurance rates. if you want to save hundreds, talk to farmers. ♪ we are farmers bum - pa - dum, bum - bum - bum - bum ♪ [announcer] the more you know, the more you could save. farmers could help you save hundreds on your auto insurance. call your local agent or 1-800-470-8496 today.

welcome back. i'm brooke baldwin. tensions are rising in eastern ukraine. national guard troops dispatched today to oust troops. some troops are apparently being harassed by pro-russian ukrainians. thus far, there are no reports of violence. but also, no indication the ukrainian troops have moved against the armed pro-russians guarding the buildings and holed up inside. nick walsh is live for us from the ukrainian city of donetsk.

tell me what you saw. >> reporter: it's been a day, really, brooke, we've seen ukrainian military absent for much of this crieses in the area of donetsk moving into the area. ourselves in the rural kind of farmland to the west of these key towns, we ran across a large column of ukrainian armored, personnel carriees, supply vehicles, paratroopers traveling with them, light artillery. they would not tell us where they were headed, but a substantial amount moving along there. we arrived there this morning and saw how the police station, which had been overrun by protesters is back in the hands of the police. the police were saying they now work with the people. so a complex situation there. but it seems like local law enforcement have come to an accommodation with the protest.

not sure how long that will last, bau hours later, according to the ukrainian president, ukrainian troops landed an at airfield near luhansk. there were reports of gunfire when pro-russian militants approached near that airfield. when we got there, we saw a crowd of locals amassed talking, shouting sometimes abuse at the ukrainian troops, about what was happening in their otherwise quiet town here in ukraine. one man tried to approach the troops, and we heard warning shots fired. i should stress at this point, despite the increase in the ukrainian military presence here, we are not seeing large reports of casualties, or evidence, or being told by bystanders or witnesses that there have been loss of life or people injured here. at this point we're not seeing clashes. the question is, how does russia react to this. the they have 40,000 troops just across the border.

brooke? >> nick, as you paint that picture, again, no violence yet, i want to play some video. we can almost see the potential for these jittery troops, here it is, being confronted by angry civilians. is there a danger that someone -- again, no violence yet, but is there danger that someone fires a shot, and russians use this pretext to go in, to invade? >> reporter: well, certainly. the video you're seeing is on the outskirts of the town. it purports to show civilians lying down in front of ukrainian tanks. scenes like that inflame the sentiment we've seen where the ukrainians who are pro-russian who feel the ukrainian troops are trying to restore the central government here, it's causing deep fissures in ukraine. one said he wasn't sure if the

east and west could live together again after this. we're waiting for the russian reaction. they have 40,000 troops just across the border. there have been clashes. there have been reports of people being injured. at this point we know of one ukrainian official killed trying to get into luhansk a couple days ago. there are reports about allegations of injury. but we haven't heard firm evidence from people we've been speaking to on the ground about that as yet, brooke. >> nick walsh in ukraine, thank you. just ahead, as the investigation and the search continues for missing flight 370, a major setback involving the bluefin. crews have no clue what the bottom of this part of the ocean looks like. plus, pack here live in boston, i will talk with someone, actually, two people, writing a book about what happened here exactly one year ago, from the bombing, to the

manhunt, to the missing red flags that were missed that could have possibly prevented this. we'll have a candid conversation. boston strong, the book, next. if you have moderate to severe rheumatoid arthritis, like me, and you're talking to your rheumatologist about a biologic... this is humira. this is humira helping to relieve my pain. this is humira helping me lay the groundwork. this is humira helping to protect my joints from further damage. doctors have been prescribing humira for ten years. humira works by targeting and helping to block a specific source of inflammation that contributes to ra symptoms.

humira is proven to help relieve pain and stop further joint damage in many adults. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal events, such as infections, lymphoma, or other types of cancer, have happened. blood, liver and nervous system problems, serious allergic reactions, and new or worsening heart failure have occurred. before starting humira, your doctor should test you for tb. ask your doctor if you live in or have been to a region where certain fungal infections are common. tell your doctor if you have had tb, hepatitis b, are prone to infections, or have symptoms such as fever, fatigue, cough, or sores. you should not start humira if you have any kind of infection. take the next step. talk to your doctor. this is humira at work. ...and let in the dog that woke the man who drove to the control room [ woman ] driverless mode engaged. find parking space. [ woman ] parking space found. [ male announcer ] ...that secured the data that directed the turbines that powered the farm that made the milk

that went to the store that reminded the man to buy the milk that was poured by the girl who loved the cat. [ meows ] the internet of everything is changing everything. cisco. tomorrow starts here. humans. we are beautifully imperfect creatures living in an imperfect world. that's why liberty mutual insurance has your back,

offering exclusive products like optional better car replacement, where if your car is totaled, we give you the money to buy one a model year newer. call... and ask an insurance expert about all our benefits today, like our 24/7 support and service, because at liberty mutual insurance, we believe our customers do their best out there in the world, so we do everything we can to be there for them when they need us. plus, you could save hundreds when you switch, up to $423. call... today. liberty mutual insurance -- responsibility. what's your policy? welcome back. i'm brooke baldwin live here in boston. we've got a guest standing by.

other news here today. take two of the u.s. navy's underwater drone, this bluefin, is back out scouring the depths of the indian ocean looking for any sign of wreckage, any sign of flight 370. these searchers are hoping they've picked a search area not quite as deep as the last one. keep in mind, this bluefin pushed to its deep sea limits, was forced to resurface on its first mission. as for the whole question over who handles the black box, whether the two black boxes are found, malaysia is now confirming with the civil aviation organization to figure out exactly which country would have custody of those boxes. it's an issue malaysia's defense minister shrugged off. >> 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 want to find out the truth. definitely we have to review

what's in the black boxes. >> here's the news today. malaysia agreed to set up an international investigation team to help solve this aviation mystery. the man accused of killing three people in overland park, kansas, will face at least two charges of murder. frazier glen cross has been charged with one count capital murder, one count premeditated murder. he could face the death penalty. prosecutors haven't made that decision yet. >> it is too early to make that decision. that is an option under the first count of capital murder. the options for the sentence are life without parole. or if we choose, we file a request for the death penalty. that is something we don't have to file when we file the charges. >> no hate crime charges have been filed yet. but the u.s. attorney is still

investigating. and one year ago today, the nation started hearing a new way to describe how americans rise up, and unite in the face of terror. two words, boston strong. two bombs went off at the finish line. feet from where i'm standing today. 12 seconds apart. three people killed that day, more than 260 wounded. and then an m.i.t. police officer shot to death during the pursuit of those two suspected bombers. and during a tribute in boston that is still happening here, vice president joe biden told the audience, boston has become the face of america's resolve against terrorism. and that resolve was evident in the first responders at the scene. and days after the bombings. i was here. i talked to one of them, a firefighter who raced toward the explosion, raced toward the danger, and when he did, he saw

what became the worst day of his 41-year career. i'll never forget this interview as long as i live. this is charlie buchanan jr. >> i saw another girl that another guy grabbed. the girl's leg was severed op the right leg. and behind her, was a little person that had to be -- this little boy that they talked about. and they couldn't do anything for him. his name was martin. and we put a sheet over him, just out of respect for him. we stopped an ambulance, and the blaps was full. but we said, you have to take this girl. and they were great. they were boston ems. and this firefighter said, you know, if you need a tourniquet, we have a tourniquet small enough -- i mean, her leg was as big as your arm, all right?

so as they put her inside the ambulance, but as you say, the only thing that i could see, and to this day, are her little eyes looking up at me. that's it. all right? and me thinking -- thinking about my own grandson, malachi, he's the same age as this young girl, who is 6 years old. the first thing you did was give me a big hug when i went home. and malachi is -- the name in the bible is the messenger of god. >> 41 years on the force, a man who had never done an interview, granted me that one. and i'll forever be honored for him doing that story. a year after the boston bombings, we're still learning about every angle of the story. two boston writers have written a book called "boston strong.

"david wedge is the former chief investigative reporter for the boston herald. nice to see you again. i know we chatted a year ago. you really had a fascinating look. thousands of hours of research with first responders and survivors and investigators. let me ask you first, what was missed? what was handled wrong? >> we're still learning that. i think we start with 9/11. we'll be learning about what happened at the boston bombings for a long time. the obama administration report that came out this past week made some indications that the fbi got some information from the russians, asked for more information, but the russians didn't provide it. so they're kind of pointing the finger at the russians, that the russian intelligence community failed. and then tangentially, the boston folks in the joint terrorism task force here, it trickled down to them. the cops that could have gone to

the houses of the tsarnaev brothers, didn't have a chance to. >> in terms of the manhunt, my goodness, wendy and randy here -- >> welcome to boston. >> welcome to boston. i'll never forget it. surreal is the word i keep hearing. it was this eerie quiet on the streets. at the time, did they know who they were looking for? did they really know where they were looking and we the public just didn't know? >> i don't think so. obviously, when that car was originally carjacked from cambridge that the brothers were in, they had no idea that they were the two marathon bombers. they thought it was a carjacking in the city, which is not all that uncommon. it wasn't until that car stopped on laurel street and tamerlan tsarnaev got out and pointed their gun at his team, that they knew it was something bigger. when the bombs fell, they knew these were the guys. they had no connection to watertown. it wasn't that far.

but they didn't know what they were dealing with. they walked into an ambush. >> you would never imagine in a million years such a quiet, quaint, new england neighborhood. you have talked to a lot of people, you and casey got this amazing opportunity to go on what we dubbed this healing cruise in france with, what, 100 people? >> yeah, there was 100 survivors and their families. >> how was that? were you nervous at first? this was christmastime. >> it was two weeks before christmas when i first got the call that they wanted us to come. i was nervous, because you're going to be on a boat with 100 people that survived this horrible tragedy. i think a lot of the people that even went were ambivalent. some of the people i talked to said they almost backed out at the last minute because they were afraid to be spending ten days talking about the marathon over and over again right before christmas. what we wrote about in our piece for "esquire" and will be in our book is the power of that cruise

was really amazing. these people met each other, they bonded. it was like a floating group therapy where they shared their pictures. >> floating group therapy. >> they would look at pictures and figure out, oh, that's me, and you right next to me at the bombing scenes. and they bonded over that. >> you have this book "boston strong" coming out in the fall, you and casey's book. we all know the movie "the fighter" well-known in this neck of the woods. you're from massachusetts. one of the folks from "the fighter" from watertown, she was in lockdown with the rest of everyone else. when did they approach you and say, hey, we want to to something with this? >> shortly after we decided to do the book and the news trickled out, they got in touch with casey, my co-author, who had a prior relationship with them with other projects, and they wanted to adapt the book into a screen play for a movie. i thought maybe it's a little too soon. the same thoughts a lot of people had. but when we really thought about it, we have a team of people

that really understand boston, get boston, and will do this story justice, and we're in a unique position to tell it properly. >> this was your home, this is personal for you. >> very personal for me. >> we look for it this fall. thank you, sir. >> thank you. >> appreciate you coming by. and coming up next here, back to our breaking news, in the search for flight 370, this bluefin-21, going into uncharted territory after the aborted mission. do investigators think the bluefin is up to the task, and if not, the bluefin, what can find this missing plane? that's next. honestly, i'm pouring everything i have into this place. that's why i got a new windows 2 in 1. it has exactly what i need for half of what i thought i'd pay. and i don't need to be online for it to work.

it runs office, so i can do schedules and budgets and even menu changes. but it's fun, too -- with touch, and tons of great apps for stuff like music, 'cause a good playlist is good for business. i need the boss's signature for this. i'm the boss. ♪ honestly ♪ i wanna see you be brave

we are just about 20 minutes

away from the closing bell. let's take a quick look at wall street. up in positive territory. the dow up 70 points. stocks started on a high point boosted by positive earnings reports from companies like coca-cola. did fall a little bit during the day. so again, you can see the numbers at cnn.com/money. meantime, this. the southern indian ocean, really pushing the limits of the world's best underwater technology. the u.s. navy's submersible, the bluefin-21, forced to return to the surface after completing only just a fraction of its intended mission monday. so to washington we go to cnn's tom foreman in our virtual room. and tom, i know this bluefin is back in the water for day two, but why is this mission seemingly so challenging for this thing? >> if you think about it,

brooke, we really are dealing with uncharted waters, a very difficult depth to work at. we talked a lot about the idea in the deepest area here, the bluefin should be able to get down around 3 miles. but think about this, if somebody said can your car go 120 miles an hour, and you say, yes, it can, it doesn't mean you routinely drive it at that level. they're expecting the bluefin to go near the limits of its capability. we found it went beyond the limit. on top of which we don't know what's down here. we don't know if it's mountainous terrain like the grand canyon, whether it's flat, that's why they're down there. they don't know what the situation is with the silt at the bottom here, whether or not anything they're looking for is sitting on the top, where it can be seen. or if it's buried underneath a lot of silt, where it can only be sensed through some type of metal detector or if the pinger had been working. we've been talking about this

with graphics like this, as if this is a simple matter of going out and doing it. it's not. this is more along the lines of being nearly an experiment than simply a rendering of a process. because they're working at the very edges of the capability of this equipment. >> an experiment, huh? tom foreman, thank you, sir. >> you're welcome, brooke. just ahead on cnn, we'll take you underwater to see how the bluefin-21 works in freezing temperatures, and total darkness. we put a go pro camera on the bluefin to see what it sees when it's searching under the surface, next. stay here. my guests are "nathan, which dish is better?". now i say you can have it all with our new seafood trios! red lobster's new seafood trios is three times delicious! choose one option from the wood-fire grill, one signature shrimp dish, and a pasta like new lobster mac and cheese. three choices all on one plate. just $15.99.

for a limited time only! you can build it any way that you like, pick your three favorite things. it is spectacular! i'm nathan tavernaris and i sea food differently. [ girl ] my mom, she makes underwater fans that are powered by the moon. ♪ she can print amazing things, right from her computer. [ whirring ] [ train whistle blows ] she makes trains that are friends with trees. ♪ my mom works at ge. ♪ my mom works at ge. frequent heartburn? the choice is yours. chalky.

not chalky. temporary. 24 hour. lots of tablets. one pill. you decide. prevacid. ♪ 24 hour

welcome back. i'm brooke baldwin. the underwater vehicle being used to look for malaysia flight 370. it is back in the water. we can report that this afternoon, after a brief setback earlier today. they pulled the device from the ocean after it reached its maximum depth without hitting the ocean floor. officials say the second try in shallower waters, to quote them, is so far, so good. randi kaye visited the company that makes the bluefin and saw firsthand exactly how this thing works. >> reporter: onboard the rv resolution in the boston harbor. we've come here to see for ourselves how the bluefin auv

operates. >> auvs like the bluefin-21, is what you'll use in deep water. >> reporter: he's a marine operations engineer for bluefin robotics which designs and builds these autonomous underwater vehicles in quincy, massachusetts. if this were a real mission, what would it be doing? >> the next thing would happen the radio instructions to the red antenna there, the vehicle would say, i will receive this mission. >> reporter: the water is only about 40 feet deep here in the boston harbor, which is easily manageable for the bluefin, because this autonomous vehicle is used to working in depths in three miles beneath the surface. 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, using side scan sonar, which identifies objects that stand out from the seabed. . >> when it's working with the side scanners, it's not actually taking pictures, right? >> correct. it's converting sound to electricity and then turning that electrical value into numerical values and then turns it into an image. >> reporter: when it returns to the surface, scientists download the sonar data to computers. the results may look something like this. >> what we're looking at here, for example, this is a ship wreck in boston harbor. you can see that there are parts of the steam engine right there. >> if something captures the eye, the navy will send down a high resolution camera and can take black and white photos covering 15 square mile as day. it's a slow process, moving three 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. randi kaye, cnn, quincy, massachusetts. >> randi kaye, thank you so much. coming up next, this might have been the first picture you saw of the boston marathon bombing. in a couple of minutes, i'm going to speak with a young man here, a suffolk university senior, who took the photo near the finish line. little did he know what would happen next. you'll hear a special tribute to the voice of boston born, james taylor. stay here. ♪

[ male announcer ] how did edward jones become one of the biggest financial services companies in the country? hey. yours? not anymore. come on in. [ male announcer ] by meeting you more than halfway. it's how edward jones makes sense of investing.

back here live in boston, it was one year ago. daniel was there cheering on s aunt and suncle and had his eye phone was was capturing pictures. here it is. it was a photo that was retreated a couple thousand times. it became one of the most memorable pictures. he's a senior here at boston university. daniel, here we are, a massachusetts native, this was personal for you. >> yes. >> you were out wanting to have a good time like so many people were. take me back to that moment a year ago. >> patriots''s day in boston is supposed to be full of joy and

strength. the boston marathon is -- that's what people use that for. i mean, it's a sign of strength here in boston. >> it's the red sox game. it's the marathon, it's the day to be in boston. >> exactly. >> and then, of course, this happens and you were taking pictures. can you describe what went through your head to begin snapping photos of clearly an explosion. >> looking the opposite way, i wasn't looking at the finish line because i'm waiting for my aunt and uncle to come past us and then the first explosion went off, turn my head and all you can see is smoke up near the finish line and it sounded like a cannon went off. it took the ground, shook everything around you. i turned around and my instinct is just to start taking pictures of it. i didn't know what it was. i started snapping photos of it and with an iphone you can keep going, keep going. i caught one fast enough that the second explosion went off. >> at the time when they were looking for the perpetrators of such a heinous crime and it was

the fbi saying, please send us photos, you had the conscious of mind to send these photos. >> i sent about 15. it was my duty. i wanted to help them capture these people who did this. no one reached out to me for the photo so i sent it myself. >> you, next monday, i heard the vice president say 36,000 people will be running the marathon. it will be the biggest and the best ever. >> the best yet. >> your aunts and uncles are running again? >> they are. >> you are choosing not to come down, your family not coming down. how come? >> it was a day for us that leaves a lot of memories behind and i don't think personally for me i'm not ready to come back down here yet. i walk down here. i live here in the city. but for that day i think it will take me a while to come back down. >> daniel, thank you so much. journalism student. >> thank you so much. >> really the tribute to

marathon victims and survivors has officially ended with the ceremony but let's be real t. will never end here in boston. let's take a look back at what boston and the nation really has overcome and it begins with boston-born james taylor singing "fire & rain" at a concert nearly one year ago. ♪ lord knows when the cold wind blows to turn your head around ♪ ♪ hours on the telephone line talking about things to come ♪ ♪ sweet dreams and flying machines in pieces on the ground ♪ ♪ oh, i've seen fire and i've seen rain ♪ ♪ i've seen sunny days that i thought they'd never end ♪ ♪ i've seen lonely times when i

could not find a friend ♪ ♪ but i always thought that i'd see you somehow one more time again ♪ ♪ thought i'd see you one more time again ♪ ♪ there's just a few things coming my way this time around ♪ ♪ thought i'd see you fire and rain ♪ ♪ thought i'd see you just one more time ♪ ♪

>> something about james taylor has that healing quality in his words. he told me before that show, he didn't even hesitate when asked to sing for this amazing city. i'm brooke baldwin. boston, thanks for having me. i'll be back, i can't wait, for marathon monday. in the meantime, let's go to "the lead" with jake tapper starts right now. if you drive a car, he'll tax the street. if you try to sit, he'll tax your seat because he's the tax man. and i'm jake tapper. and this is "the lead." the world lead. try, try again. the best shot at finding flight 3 370 and the 239 passengers on board is back in the ocean. the first time did not go so well. we'll ask the experts, if this is going to take so long, why can't they stick more than one down there? and ukrainian forces are on the march, many suspected of being on russia's payroll. is this the brink of civil wa