♪ when you think about it, isn't that what retirement should be, paying ourselves to do what we love? ♪ you are in the "cnn newsroom." we are learning the u.s. plans to conduct military exercises in eastern europe sending troops to poland and u stoestonia.

frederik pleitgen is in the ukraine now. describe the action you're hearing to the news we were just able to confirm that the u.s. is going to conduct military exercises in pooled and estonia in russia's north border? sorry. we are losing frederik pleitgen in there in ukraine and effort to get him back to react on this. now the latest on the ferry disaster in south korea. the death toll stands at 36. divers recovered three more bodies from inside the sunken ship. 266, mostly teenagers, remain missing. we will have a live report from the port where families are holding vigil for their missing children. we want to talk more about the rescue and recovery efforts there. joining me is mary, a 21-year veteran of the u.s. navy and

u.s. coast guard. he is a rescue swimmer and writes often on maritime safety. thank you for joining us. a question that strikes me, a number of days since the ferry went down. still rescue efforts under way there. you know these situations very well. is there any realistic hope finding people alive inside that ship? >> i think we have gone from -- we have moved from hopeful to miraculous if there is someone alive on the ferry. it's a long time. the water is very cold. even if they managed to get into a completely dry space, the -- the temperature of the water around the hall would make it just terribly cold inside and i wish i could give you a better idea about that, but i don't think -- i think we are looking at a recovery now and no longer a rescue. >> it's always difficult in these situations because you don't want to away any possible hope and certainly take every opportunity but you also want to be realistic.

one thing that divers on the scene have discussed there this is the idea of raising the ship because they are concerned about the pressure differentials and it's hard for them to get inside the ship. can you explain to our viewers what advantage that would be if they bring the ship up? >> if you bring the ship unand higher in the water, that pressure goes away. what they are talking about is if they get to a space and if behind a certain water tight door, let's say, it's dry, they wouldn't be able to open that door and if they did then it wouldn't be dry any more. those pressure differentials make it impossible to enter the ship in certain spaces. even if you thought someone was behind a space, if they were opening the door would cause hazard for everybody. it would be much safer for everybody if they can bring the ship up. >> one of the most frustrating things about this certainly for the families involved, even for our viewers, is the idea that the captain and his two first mates, third mate, you know, the most senior officers on the ship, that they left before

everybody else and, in fact, after telling everybody else on the ship to stay put, saying it was safer to say put. any circumstances where they would have reason to do this? >> i've been thinking about that two days and i can't think of any reason staying put is a good idea. in fact, there is drills and procedures and they always include go to muster station and we have heard they didn't tell them where that station was and they might have a safety brief and those things will comou in the investigation but it's never a good idea to sit there and wait. i get maybe there was a hazard with moving people around the ship but given the weight of the ship and the weight of passengers, moving around didn't cause any hazards. i think he traded this perceived idea being safer for actually being safer and he should have moved into the deck, i think. >> a hundred years after the "titanic" went down get people in the life rafts and have

enough life rafts on board for them. and a couple of years after the costa concordia case and a captain leaving the ship you think so much coverage of situations like this their first reaction is react quickly' get people into the life boats. do you find it amazing particularly south korea is a major industrialized nation. do you find it surprising that it didn't have, you know, those kind of reactions in place? >> well, you know, korea builds 30% of the ships in the world and only behind china. they are a big maritime country. this is the 100th ferry accident we have had in the last 12 years. the disconnect for me is we have the training and the drills but what people know to do in emergency and what they actually do in emergency are different just like the "concordia" and with this accident. so every captain in the world is saying, i would have done something different, but in that situation that is how that crew

behaved. i think what needs to happy really is we have to start paying attention to not just what the drills are but how the people react in an emergency and it's an entirely different set of training rules. >> one more place there needs to be a lesson learned. thank you very much. we are going to jindo island where this ferry went down off the coast. the parents are anxiously awaiting news about their children. you probably heard that commentator there there is unlikely survivors inside. how are parents coping through that as they await for answers? >> we are hearing them say the exact opposite they don't want to hear that. in a q&a session yesterday with the coast guard many parents saying why aren't you trying harder? my child is probably still

alive. the parents are clinging to miracle stories. there is a white tent over my shoulder and that has been filled with parents ever since the ship went awry, every since this disaster began five days ago. they just don't want to go there. they don't to believe that so many high school students, their lives may be over. so at this point, it's a very delicate dance between how the government is handling this and what they are telling the families and the families are starting to become very agitated. they are very angry and they are also very upset because as you can imagine, jim, the amount of grief, the overwhelming grief that these families are going through is cal panel. >> as a parent myself, you know, i've struggled to imagine it and i don't even want to think of it, so i empathize. it's interesting. we talked about the missing malaysian flight. you were there covering that as well and certainly frustration among the families.

do you see, for instance, as south korean government confers with parents when to use large sea cranes to lift the ship, do you see the south koreans learning some lessons how the malaysians mishandled that flight and the families are trying to be more differential in effect? >> reporter: they certainly appear to be. they are very -- two very different cultures and there's a different level of respect that each government commands from their people, but there is a growing distrust. the same sort of distrust we saw among the chinese and the malaysian family members to the government, to the malaysian government to how the koreans are reacting. this happened moments after this

disaster began, the parents initially thought all of their children had survived. and then to be dramatically told that wasn't the case, that laided groundwork and led to a distrust and snowballed to this point. >> thank you to kyung lah covering the tragedy there. could the flight 370 recovery be heading to a different stage in the next coming days? we will talk to our panel about what it means and if the bluefin comes up empty this time. that's after this break. for addressing my health risks. but she's still gonna give me a heart attack. that's health in numbers. unitedhealthcare. co: until you're sure you do.you need a hotel room bartender: thanks, captain obvious. co: which is why i put the hotels.com mobile app on my mobile phone. anyone need a coupon?

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there was pushing and shoving and fighting today at one of the holiest sites in christianity. outside the jerusalem church

where christians believe jesus was buried. robert sarr is the peace envoy to the middle east. he says he was pushed against a metal fence and pushed by a crowd before guards finally let him pass. israeli government officials haven't commented on the incident which you can see happening right there. now back to the hunt for the malaysian airlines flight 370. it is an extremely critical phase and we have learned about a key deadline. the blue-fin 21 underwater drone will finish its entire search mission in five to seven days after the experts shrunk the search area for focus the mission. >> the narrowing of the search for today and tomorrow is at a very critical juncture. >> if the blue-fin 21 comes up empty the next week, it will be

time for all search crews hunting for flight 370 to stop, regroup, and reconsider. the whole search operation may need fresh thinking. joining me now to discuss is david gallow and arthur rosenberg, a pilot and aviation engineer and cnn aviation analyst michael kay. david, i want to begin with you. this talk of this deadline have you a great success rate what is found in air france after two years. very difficult conditions as well. what is the significance of this going through, saying, we have another week to look at the search area that we have to find, at which point, we are going to rethink if we haven't found anything? >> the logical thing to do. we have a ways to go yet. five to six days and a lot could happen in that time. i think they are halfway through that area. if they fint nothing we have to go back to the pingers and the best evidence we have that this is the resting place of

malaysian flight 370. >> if you relook at the pings from the data recorders to make a reassessment -- >> let's make sure we didn't miss it. i know they have been being careful but be sure you don't leave that area until you're positive it's not there. >> arthur, another question for you. there has been frustration from the beginning on a lot of levels about sharing of information certainly from the malaysian government side and saw that with radar data early on. you have some frustration aimed at a satellite company that provided the pings that were coming from the jet's engine before it disappeared. do you think use if that data was released publicly and united kingdom have more people looking crowd sourcing? >> absolutely. we have talked about that quite a bit. the data that doppler phase shift that they did is very

prioritia proprietary. the world wants to see the nitty-gritty of that data and putting it out there would get a whole lot of other people involved in the analysis. i think it would be helpful from a technical and practical standpoint the families would actually see some progress and some transparent sane openness in sharing of information. while we are talking about that i would add to it it would be very nice if the malaysians released the radar data which we have talked about as an ongoing thing. we have the airplane at one altitude, dropping to another altitude. 39,000 and 45,000. i think awful that, these are the constituent elements that give us more of a microscopic precision on where that wreckage

might be. >> the issue is sensitivity because that is military data and these countries don't want to expose that which i imagine would be a problem. >> let me just say just one thing. that malaysian radar is not the best radar on the planet. i don't think they would compose any great military secret. they had a plane that through across the peninsula with impunity for over 30 minutes and be like going from new york to l.a. -- >> and not raising an alarm but i imagine that is why they don't want to release the data because there is more, michael. >> yes. should we be open for-to-that data and what seems to be conflicting data on what is on the radar. the last thing in the world we need is for information to be misflped. it has to be analyzed by the

experts. we have been given facts and drawing no conclusions. what i'd like the malaysians to do if they would rather analyze the information on the altitude changes, how they actually got the altitude changes. we have been around this a million times in terms of the radar. there is no transponders and surveillance data doesn't work and draw conclusions to it so when they come on the world stage and give us some information, there has to be conclusions as to what it actually means, rather than we think it went to 39,000 feet and descended. i think we need to interrogate that. not just stopping the pings, going back to malaysia and drawing some conclusions and getting the bigger picture. >> that is the whole investigation of why this happened and you're still at the stage, though, where is the plane, right? >> of course. we are still on phase one. let's not go to phase three

until we understand what phase one and two is. >> certainly there could be more sharing on all side and we will have another opportunity to speak about this. thanks very much to our expert panel again. we are learning another international story that the u.s. is planning new military exercises near russia in response to the situation in ukraine. could this show a force and draw the u.s. closer to a confrontation with moscow? we will ask an expert after this break. for a while, i took a pill to lower my blood sugar, but it didn't get me to my goal. so i asked my doctor about victoza. he said victoza works differently than pills, and comes in a pen. and the needle is thin. victoza is an injectable prescription medicine that may improve blood sugar in adults with type 2 diabetes when used with diet and exercise. it is not recommended as the first medication

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new details in the crisis in ukraine. cnn learned a company of u.s. foof troops will be training in poland. now let me bring in angela who is the author of "the limits of partnership u.s./russian relations in the 21st century. >> thank you for being with us. let me ask you about these latest developments. the small number of troops but

to be rotated in and out, a continuing rotation there. what kind of message does this send from the u.s. and nato to russia? >> i think we need to reassure our allies. clearly the baltic states and poland are concerned that the troops amassed at the border of ukraine exercising the past few weeks. at what point putin said would withdrawal the troops, nothing has happened there. the tension is rising an an agreement was signed on thursday that is is not being implemented in the east of ukraine. so we need to show russia that we stand by our allies and that we are concerned about what is happening there. >> does 300 troops split between two countries send that message compared to the 40,000 russian troops off the eastern border of ukraine? >> at least it shows that we are going to have a more or less

permanent presence by rotating them in and out. before that we didn't have those kind of forces there. it's a message. it is the beginnings of making sure that we do have troops there most of the time. >> there were going to be more air patrols and ships as well and part of a broader plan. you reference this agreement that the u.s./russia signed a short time ago on thursday to deescalate tension. they vacated the buildings they have seized but haven't done that yet. do you see this holding up? >> i don't think yo. i'd be very dubious. not only have they started to vacate the buildings but now presence in them and cutting off internet access that they are strengthening their control there. the question about this agreement is who is supposed to implement it? it's not clear.

the separatists in the east saying they won't stand down until the government in kiev stands down too because they say it's a legitimate government. absent some other group of people or force going there, and making sure that these separatists vacate the building i'm not sure how that is going to happen. >> if i can can ask you briefly can the u.s. and russia relationship recover from these events in the past few weeks in ukraine or is this permanently damaging? >> well, i think it's certainly damaging for the foreseeable future and i'm sure for the rest of president obama's term in office because this is a relationship that wasn't in good shape before the crimea events happened. remember, mr. putin gave political asylum to edward snowden last summer and two days ago, edward snowden appeared on a show. so really flaunting the fact he is still there. i think it's going to be very difficult to recover. that doesn't mean that at some point in the future there won't

be a attempts made to improve it but i would say we would still be working with russia on syria, iran, the arctic, post 2014 afghanistan. there are areas where we have to work with russia but it's going to be much more difficult. >> let's hope those areas of cooperation keep up. thanks, angela, professor at georgetown university. it is one of the oldest cliches for sailors. the captain always go down with their ship, but what happens when they don't?

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welcome back. i'm jim sciutto in new york. it is just after day break now off the coast of south korea scene of a monumental disaster. 270 people, most of them high school students remain missing three full days after the ferry they were in suddenly tilted and sank. rough seas and zero visibility working against rescue divers not giving up hope some could still be alive inside the ship. the harshest light is thrown on the ferry's captain who admits he was not at the controls when the boat started going down. >> reporter: the captain of the sunken south korean ferry boat under arrest. seok is facing charges and fierce criticism. >> the real question is why did he not stay on board and not go down with the ship but supervise until every accounted for

passenger was off the vessel? that is a crime under korean law and that is arguably a violation of international law. >> reporter: among the captain's charges, failing to do the right thing to guide the passengers to escape. yes, there is the old maritime adage from the captain goes down with the ship. but it doesn't always happen. fr this man is being charged abandoning ship. 32 people died after they slammed into the rocks off this island. >> i don't think you can rely on the people on board but, rather, those in charge of directing the people on board. >> reporter: captain rick smith trains cadets on a 565-foot long vessel, the empire state. he says when disaster strikes, saving lives depends on clear thinking between the captain and

the crew. >> bottom line, i think, where you find people are amazed how quickly things escalate or how fast a ship could sink. >> reporter: women and children first was the evacuation order heard on the sea in 1852 and the commander coming from the captain of the burkenhead who went under with it. and most famously on board "titanic" where 1500 passengers perished and so did the captain who never left the supposedly unsinkable ship. >> alexander is with me live. is the old the captain must go down with the ship that is not law, right? >> right. we the captain goes down with the ship. the meaning is the captain his responsibility to get the passengers off the ship and not to rescue himself and leave passengers on the ship to defend for themselves. >> it's incredible to see those

pictures of him climbing off the ship when there was still an opportunity to get the passengers off. what kind of charges is he facing now? >> really serious allegations here. if convicted on these charges could be five years to life in prison. the allegations including negligence causing bodily injury and failure to reach other ships for rescue and abandoning the ship. we know the captain was not at the helm at the time the ship began to sink. that part is understandable. this is a long voyage and understand the captain would to breaks from the helm but what is inconceivable he would leave with so many children on the vessel. >> the worse crime was, one, the bad turn which seemed to cause it flip over but not engineering that rescue, yeah? >> again, this message the children and others on board were hearing to stay in place. there is no one we have spoken to the last three days who can shed any light on why that would be the directive that should be given. we have heard the captain spoken out saying he was concerned

about the conditions in the water and that is why he didn't issue that order to move faster but from everyone we have heard from the last few days the most important thing is get the kids out. >> you see the ship go down and it still has all of its life boats attached to it. >> heart breaking. >> it's incredible. alexandra field, thank you. one more note about this hour about that disaster in south korea. a pitcher for the los angeles dodgers that is him there. the team says he is donating a hundred thousand dollars to the search effort and is sending messages of support to the heart broken families in his home. in some ways we know more about the moon than the underwater depths of our ocean. a huge challenge in the search for flight 370.

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you've heard it often in there story. if there is a place we know less about than space is the floor of the indian ocean. only a fraction under the waves is mapped there and adding to the trouble in finding the black box from flight 370. martin savidge went into a sub in canada to get an idea how difficult any recovery operation would be. >> reporter: the very fact that we are able to bring this to you live from down here underneath the water in horse shoe bay in

british columbia is remarkable. there is something orange there which would be our simulator of the black box it's a very slow, methodical job. when you're way down at that kind of pressure, it's going to be even more carefully done. >> forward. come ahead. come ahead. like everything else it's never easy. you see when we move a bit to get a better grip on this thing, a big cloud of silt comes up from the bottom and now we have to wait for the silt to settle until soledad o'brien we we soo what we are doing. >> reporter: there is a mechanical arm similar to what might be on an rov and that would be used in the retrievable process of something, say, like a black box. there is the black box recorder. they are orange, despite the name sake. we are at a real slant here so

that is a real challenge for us but the goal now, to take the mechanical arm and he has got to very carefully go ahead and give it a whirl, get it into position and, again, it's not just like reaching out with your own hand and grab. >> trying to get the -- excuse me, the jaws of the manipulator into a handle on the top there and try not to disturb it and slide it down the slope here. >> he is trying to get it into that basket. get it up in the air. it just demonstrates for you it's not just a simple task of just going down there and finding it. the next step is finding it and then retrieving it. it has to be done in a way you can't damage the black box. it has to be done in the way everything is carefully preserved and we are just about

there. well done! got it in. until you find the wreck, you don't get to do any of this. >> that's right. >> martin savidge deep under the waves there. we have telescopes can look into the cosmo but the landscape is a total mystery so why is that? we will ask our panel after this. an exciting prime time double-header tomorrow night on cnn. at 9:00 p.m., anthony bourdain takes on las vegas like you've never seen it before. then after that an episode of "inside man" are we meant to live forever? morgan spurlock explores that sunday night at 10:00 p.m. eastern time right here on cnn. they work fast on heart burn and taste awesome. these are good. told ya! i'm feeling better already. alka-seltzer fruit chews. enjoy the relief!

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now to the hunt for malaysian flight 370. at this very moment the blue-fin underwater drone is on its seventh mission under water. thousands of feet under water in a remote part of the south indian ocean. why is it hard to go just a few miles under water? i want to read you from "time" magazine charlie campbell. men played golf on the moon and images from the surface of mars is utterly commonplace.

the hubble telescope can see 10 to 15 billion light years into the universe but a three miles under the sea that is a true twilight zone. i want to bring in our expert panel david gallow who is the hole institute and a sound expert is here and michael kay, former royal air force. david, perhaps i can start with you. why such a mystery under the ocean? is it the conditions, the money, the technology? >> sure. it requires technology. it's vast. it's covering 70% of the earth surface and its deep average depth about two and a half miles. the pressure there is incredible. you can crush the "titanic" like a paper cup in your hand and it requires specialized technology to get down there and begin to explore. >> michael, one question that comes to mind here is why aren't they showing -- you have this one blue-fin 21 but others exist in the world and it moves at a walking pace and you're mowing the lawn in effect three miles

down. why isn't there half a dozen searching now to narrow the search area more quickly? >> that is a really good question. i think david is probably a better person to answer that. >> well, i think it's the tactics that have been chosen. they have the pinger locations and we only need one vehicle to go right to the spot. captain matthews is running it said that is their goal. it's a bit different than a wider area search but only a handful of technologies on the planet that can get to that depth in terms of robots. >> a thing called battle space deconflickion and means coordination of assets and at 15,000 feet is difficult to do, 12 aircraft in the air. don't underestimate how difficult it is to deconflict and what might impact it might have on effectiveness. >> paul, you're an audio expert. it's been about the pings. really the only hard clues under

the water. they searched on the surface and haven't found any wreckage. a couple of weeks ago we heard nothing and now they have these pings. how strong after lead? how much is your confidence that they are looking in the right place based on the information they have? >> i'm very confident, because we had an initial acquisition of two hours, 20 minutes. we have the pulse repetition rate very stable. the amplitude that was within the time that the batteries were operating. we don't know of any other aircraft that were submerged with other pingers that we would have expected to hear, especially in that area. >> now, they are looking into space. you're confident, we have talked before about your confidence level they are looking in the right place. yet, still, the director of the research saying they may take a break. if over the week or so they don't actually see, in effect,

the wreckage on the bottom they will look somewhere else. david, is that the right move? >> if he is confident they have seen nothing in this phase with the blue-fin, what else is he supposed to do? i think they will take a hard look at the data they have collected and maker sure they haven't missed that aircraft and look at the priorities and go from there. sure, it's the right thing to do. >> michael, the surface search is another option. lots of assets up in the air but they haven't found anything. what do they do with that? do they also take a pause? >> it goes back to the constraints on what they have been working at, the tempo. it's over 45 days now. we really must take our hats off to the air crews and the engineers that have been providing that search tempo. items tough tutedy. >> it is you have to reset the airplane in terms of the various levels of surfacing and are extremely important the number one thing is maintaining the

effectiveness. there is fatigue in every stage. listening for those pings is very painstaking. what you hear initially is noise and only faintly with some enhancement techniques can they bring on the ping and have to verify it and measure the strength. >> we talked about those spotters in the airplanes too. they have to spend hours staring out at the sea. that is exhausting as well. david, what is key in finding the other great mystery a flight on the ocean floor, air france took a couple of years after a lot of stumbles. help, if you can with, with expectation management for our viewers. it's been 45 tas. two years with air france. >> two years calendar time and two weeks spent on the water searching separated by a year. we spent eight of those ten weeks in an area that was defined by retrodrift

calculations. we had debris calculations were made to tell us where it came from and not where it came from so we spent two months in the wrong haystack. altogether maybe a little over a week, maybe eight days even we spent before we found the flight. i think they have got the right technology. they have got the right team. if the plane is in that area there will show up and they will find it. >> we are the transponder and we have the -- and it's still took that amount of time. >> credit where credit is due. there has been an incredible detective story and still a great mystery. >> information, misinformation, reinterpreted information, and, yet, we have all of the arrows pointing into this general area. >> and withheld information in some cases. thank you all. we will come back to this topic again before the end of the hour. not many searches we can compare to the hunt for flight 370 but one a mystery that haunted ocean explorers until it was finally

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a u.s. drone strike has hit its target in yemen today. three well-known al qaeda operatives are among ten suspected militants killed in the strike and three civilians in a separate truck also were killed. the hit follows video evidence of the largest and most dangerous gathering of al qaeda in years there in yemen. one more nigeriian school girl is back after being kidnapped by a terrorist group. 129 students taken and 84 still unaccounted for. the militants believe that western education is a sin. on the eve of easter sunday, pope francis is calling on catholics to spread the face.

services were held at st. peters basilica leading up to the ho holiest day on the christian calendar when the pope delivers a message to the crowds there. four french journalists held hostage in syria for a year are now free. the fremnch president's office say they are in good health despite the enduring incidents they endured. the men were found tied up and blindfolded near the turkish border. we would like to use the word unprecedent when hunting for the flight 370 but one search that is somewhat similar. 29 years since "the titanic" were found and some of the lessons there apply here. we have more. >> reporter: if the flight for 370 seems a mystery after six

weeks of hunting in a vast stretch of ocean think back to another ill-fated voyage one that ended exactly 102 years ago. the "titanic" set sail on april in 1912 and cost the modern day equivalent of $4 hundred million. hark stephenson served as the adviser of james camera director of the blockbuster movie "titanic". >> "titanic" was a well-built ship and obeying the rules at the time. >> reporter: four days later, the titanic struck an iceberg and fate was sealed. more than 1,500 people perished. for 75 years the luxury liner remained on the sea floor. in 1985, searchers finally

realized why the wreckage has eluded them. the transmission turned out to be wrong by 13 miles. the wreckage was finally found split in half resting over 12,000 feet below the ocean surface. still, compared to the search for flight 370, the "titanic" expeditions were at an advantage. >> in this case we don't have a reported stress position. >> reporter: much about the two efforts says stephenson is similar including the use of underwater search vehicles. >> in 2010 they use technology is that almost virtually identical what they are using in the search for the malaysian airliner today. >> reporter: if the wreckage of the plane is found the next step is analyzing it and a lesson learned from the titanic is not to jump to conclusions. >> a lot of investigations why

it sank. was it a design flow? were the rivets weak? they try to point fingers at it and if you look at each thing in isolation you really can disprove it. >> reporter: the way to solve the mystery this time, he says, is the same. >> if we can find the wreckage as we did find the wreckage to the titanic we can reverse engineer and figure out what happened. with titanic, the wreck will have the last word. >> reporter: jean casarez, cnn, new york. the death toll for the sunken ship in south kor