the backseat and they weren't hurt at all. i said dumb before, but i will add this, reckless. and i hope the police are using that in their charging document because when you got kids in the car, even when you don't, you don't go around the guardrails. thanks for watching everyone. my colleague wolf starts right now. hello. i'm wolf blitzer reporting from washington. two major stories developing this hour, the deadly shooting at ft. hood, texas, we're now learning new details about the soldier who killed three people, wounded 16 before turning the gun on himself. that's coming up. also, the hunt for malaysia airlines flight 370. we're learning new information at this hour. here's what we know right now. officials coordinating the search in the southern indian ocean will have what they describe as a major announcement in a few hours. so far officials aren't revealing the nature of the announcement, but they describe it as "big." we've also learned that a british ship will be conducting

a specific -- a specific search when daylight comes in a few hours. it's not clear what they're zeroing in on right now. the search zone has shifted again. this time a little bit to the north. officials say they're refining the zone based on continuing analysis of satellite communications and the plane's capabilities. just a few hours search crews will get some high-tech help. the australia vessel, ocean shield, is expected to arrive carrying a device that could help find the pingers on the data recorders. the batteries on those pingers are expected to run out in about four or five days. it's a race to find any sign of malaysia airlines flight 370 off the coast of australia. those pingers and data recorders are about to run out of power and they will go silent. this comes as the search zone shifts once again, as i said, to the north. our own will ripley is joining us from perth, australia. that's the staging point for all these ships and planes involved

in this search. you've got some new information. will, walk us through what you've learned. >> reporter: yeah, well, just within the past hour the australian defense force confirming this to cnn. so let's start with the first news. the british ship, the shield, that will be conducting a specific search, we don't know what they're looking for but this means that it's not random. they are going to a specific location looking for something. what that is we just don't know right now. but a specific search -- and this is really the first time we're seeing this happen as opposed to the random search where planes and ships are just kind of scanning the ocean floor and looking for anything that they could possibly see. the other big announcement, the big operations announcement, will be coming later on today on friday here in perth from angus, houston, who is overseeing the joint operations coordinating this whole thing. again, we don't know what the announcement's going to be but we're told a major operations announcement is coming. and then the ocean shield just hours away now from the search zone arriving slightly behind schedule, but now arriving to

this new search zone to the north with those high-tech tools from the u.s. navy. so in addition to the ocean shield arriving we also have the british submarine in the area listening. we have the echo listening as well. so all of these are signs, wolf, that this search effort is really ramping up. >> what are you hearing from your sources over there, will? as you know, four, five, maybe six days the batteries will dry up that are operating those pingers, if you will, from the flight data and cockpit voice recorders. what are they saying to you about the possibility that they will actually find those so-called black boxes? >> reporter: well, you know, i think everybody is -- we have to be realistic here. because we're still talking about a huge area that's being searched, an area that is being constantly refined. you know, you notice that they're moving the track up to the north. there's a reason for that. the reason being that the plane traveling at a low altitude may have been burning fuel more quickly. and so the thought is move the search area up north perhaps the

plane went down earlier in its flight path than what the data originally showed. but, again, we have to be cautious here because we've had a lot of promising leads over the weeks as we followed this story, wolf, that turned out to be nothing. but to hear there's a specific search happening tomorrow, it's certainly an interesting development that we're definitely going to stay on top of. >> and there will be in a few hours a major announcement of what they're calling a big development. we don't know what that is, but that's obviously something that is certainly raising a lot of expectations. all right, will, standby. we'll get back to you. much more on the mystery of flight 370 coming up. let's go to ft. hood, texas, right now. the military base is reeling from the second deadly shooting in five years. here's the latest on what we know. officials say the gunman, specialist ivan lopez, went from one building to a second firing at the victims with a .45 caliber handgun. army secretary john mccue says lopez was being treated for depression, anxiety and sleep

disturbances. he was being evaluated to determine whether he suffered from post-traumatic stress disorder but had not been diagnosed. lopez served four months in iraq back in 2011 and had just arrived at ft. hood, texas, from another base in february. a neighbor says lopez and his wife looked like a normal couple and they would smile whenever they'd see someone. right now investigators are looking for anything in his military record that might explain his deadly rampage. the army secretary says so far they haven't seen any red flags. >> he was seen just last month by a psychiatrist. he was fully examined. and as of this morning we had no indication on the record of that examination that there was any sign of likely violence either to himself or others. no suicidal ideation. so the plan forward was to just continue to monitor and to treat

him as deemed appropriate. >> our pentagon correspondent, barbara starr, has more now on lopez's military history. our george howell is in killeen, texas, that's the home of ft. hood. barbara, first to you. do we know whether he actually saw combat? he served in iraq for four years. any indication he was injured at the time? >> actually, wolf, he served for four months. let me just correct that. >> four months, you're right. >> yeah, let me clarify that. and that's what's so interesting, four months at the end of 2011 when the u.s. was wrapping up its operations in iraq. and basically he was a truck driver. those are the months in which they would send soldiers in to drive vehicles and equipment out of iraq, essentially drive it back to kuwait. we have every reason to believe that is some of the work he did. no indication that he saw any kind of combat in terms of what other soldiers had been through.

no record that he got a purple heart that he was ever wounded. was it traumatic to him? that is something to be determined. he reported at some point that he felt he had traumatic brain injury, and he was being evaluated for post-traumatic stress. no formal diagnosis of that yet. but secretary mccue that you saw there a moment ago also said that lopez was on a variety of medications. he named one of them publicly, ambien. so all of this, this entire medical, physical, mental health history is going to be part of what investigators now are going to look at to try and determine what was going on with this soldier. were there any warning signs that might have been overlooked? >> obviously no more u.s. troops in iraq, barbara. but correct me if i'm wrong, wasn't it normal for u.s. soldiers who served in iraq to be deployed there for a year at a time? because when i heard he was deployed for four months that raised some flags in my mind.

but what was going on? why was he there only for four months? >> well, we still have to get the full answer on that. the army has yet to release his full military record. but you're right, wolf. let me say that some of the troops who saw really the worst combat years of iraq served 15-month tours, as you recall. most served a 12-month tour. but at the very end in 2011 as the u.s. was finishing up pulling out by december of 2011, during those last couple of months they would send individual soldiers in, or small units in, to work on all that equipment. tons and tons of equipment and get it driven out of iraq back to kuwait. he was a truck driver for the army. he works those final months in iraq. so the thinking at this point by several sources i've spoken to is that's likely the specific work that he was doing, driving vehicles, working on them,

maintaining them in those final months and weeks of the u.s. war in iraq. wolf. >> barbara, thanks very much. we're going to learn a lot more about ivan lopez in the coming hours and days. let's go to george howell there at ft. hood. this is the second deadly shooting at ft. hood, as you know, george, in five years. major nadal hasan convicted in a rampage that killed 13 people, one civilian, wounded 32 others. walk us through this latest shooting unfolded whether there were changes in place since 2009. >> we do know, wolf, of a couple changes here on post. we know first of all there was sort of a neighborhood watch here if you will on post. people looking out for potential problems. that's one thing. we also know commanders were trained to look out for instances of workplace violence. and dispatchers they have new abilities now basically to pinpoint the location of phone calls as they're coming in, when they're dealing with the

situation like we saw the other day. wolf, you have to consider it was a very traumatic situation for folks here. they've dealt with it before as you mentioned in 2009. they dealt with it again yesterday. a situation where the sirens were blaring, people were told to shelter in place. this base was on lockdown. and as we understand it that he went basically from one building to the next, between two buildings, a medical building, a transportation building. went into one building, fired shots, got into his car, fired shots and went into this second building. that's where he was met by that military officer, that's when he used his weapon to take his own life. >> what do we know, george, about the 16 people who were wounded? >> reporter: at this point we did get some information just recently from scott and we know nine patients are at that particular hospital. a total of 16 people injured here, but nine at that hospital. of the nine three remain in

critical condition. so we continue to monitor, we're keeping in touch with our sources there at the hospital. we know that some of the patients are doing better. some may be discharged today. again, a total of 16 people who were injured, wolf. three people who were killed in this shooting not including the suspect here who took his own life. >> george howell at ft. hood for us. thank you. when we return we'll dig deeper into the flight 370 investigation and the challenges facing search crews right now. they now only have a few days left before the battery power on the flight recorder pingers runs out. and later, credit for ending the killing spree at ft. hood is now going to a military police officer who confronted the gunman. the base commander says what she did was clearly heroic. avo: wherever your journey takes you the expedia app helps you save with mobile-exclusive deals download the expedia app text expedia to 75309

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time is clearly ticking for search crews scouring the southern indian ocean right now for any sign of flight 370. the battery life of the data recorder pingers last just about 30 days, that means they're due to run out of power on monday. maybe they'll last a little bit longer, tuesday or wednesday, we'll see. but let's bring in our panel of experts to talk about today's developments. mark weiss, former 777 pilot for american airlines. peter goelz, former ntsb managing director. tom fuentes, former assistant director of the fbi. tom, so australian officials, they say they have a major announcement a few hours from now. it's already approaching friday morning over there. a big announcement they say i have no idea what it is, are you hearing anything? they raised these expectations

and inevitably at least over the past four weeks we have been disappointed. but they say big announcement, what are they talking about? sfwl i don't know, wolf. i agree. how many times have they done this now, raise the expectations, raise the excitement level only to find nothing. and i mean, send the ship out there and find something then you can jump up and down about it. >> but they did say now that they're looking at a specific area. they're sending the ship with sonar to look at a specific area, which indicates to me maybe they're onto something that they haven't told us about yet. >> maybe they got a piece of wreckage. maybe the sub picked up a faint ping. we can only hope. maybe they're simply expanding, you know, the fleet that's searching for it. but let's hope it's something good and something solid. >> mark, they have to really be careful because families are listening to every word. their hearts go up, they go down. they're so confused. they're so frustrated. totally understandable because of the ups and downs of the public comments by malaysian and occasionally australian officials as well. >> absolutely. i mean, the families don't know

who to trust, who to listen to or what to believe. and when you think about how much -- how little information really is out there that we can go on, i mean, you know this refining an area perhaps they've done some more studies with altitude and distance the plane may have covered. >> what's the batteries for the flight data, the cockpit voice recorders are gone, the pingers, it becomes a whole new search operation, right? >> it becomes a very difficult search once the batteries are gone. >> describe the difference in searching for these flight data and cockpit voice recorders when they're pinging and when they're not. >> well, when they're pinging you at least have a two or three-mile underwater area that you can hear. when they shut down you've got to be directly on top of it. you're using side scanning sonar that has a far limited area to search. you've got remote vehicles that are looking with cameras, which are very limited. it becomes a very challenging

and long-term operation. >> it took two years just to get some perspective to find that air france jet liner that went off the coast of brazil in the atlantic ocean even though they found some debris, some wreckage five days in after the crash, it took two years after that to find the cockpit voice recorders, the data recorders. just to give it some perspective. you wanted to make a point? >> no, i'm saying that this is -- if we don't find something in the next week, we are in for the long haul. >> and what's also frustrating is that once again they're refining the search zone. they seem to be doing this a lot lately. >> well, that's why i say just go do the searches. get it done. find something. then come back and get people excited. don't raise these hopes over and over and over only to later be pessimistic when you didn't find anything. >> i can only assume they're refining the search zone and then moved it north 700 miles and then closer to australia,

east a couple hundred miles, now they're moving it north a little bit. is that because of the currents? they think maybe -- or they simply haven't seen anything in the earlier search zones so they're going to adjacent areas? >> well, certainly going to go to adjacent areas because they haven't found anything. but again this is not a static situation as you would have on the ground. this is the moving currents. but the other thing and i really do believe they've probably refined some of the search area based upon the handshake pings. but now new calculations on altitude, speed and the range that the aircraft could have covered and winds aloft at various altitudes. >> and it's like a lawn mower, right, peter? they're searching all those areas going up and down, a whole bunch of planes from different nations doing it. >> i've seen charts from a number of searches very detailed, very painstaking, very slow. >> very frustrating. all right, guys, let's see what this big announcement that they're about to make in a few hours actually is and how specific they're going now for the sonar detection in this

search area. maybe they're onto something we can only hope. just ahead, the ft. hood shooter was not supposed to bring his gun on base. i'll ask a u.s. congressman who represents ft. hood and that district if rules should be changed to have all troops be armed while on base just for situations like this. you know how painful heartburn can be. for fast, long lasting relief, use doctor recommended gaviscon®. only gaviscon® forms a protective barrier that helps block stomach acid from splashing up-

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of killing three people and wounding 16 others before taking his own life. major nadal hasan shot and killed 13 people and wounded 32 others. republican john carter represents most of ft. hood in his texas 33rd district. congressman, thank you very much for joining us. >> thank you for having me, wolf. >> and our heart and deepest con doll sen doll enss to all the families. as you know specialist lopez legally purchased that .45 caliber handgun at a gun store in killeen after passing what was described as a standard background check. did they miss anything here? >> probably not. we run fairly good background checks and a lot of it is answering questions of people that are there to do wrong can lie on the questionnaire just like you can go to a doctor and lie about your diagnosis if it suits your purposes. i think it was legally purchased

and he went through a background check because you can't purchase a weapon without the at least the criminal background check. >> let me ask you this question about whether more people on the base should be armed. here's what the u.s. army chief of staff said before congress earlier today. listen to this. >> what's your view about one way to deal with attacks like this is to have installations where people are armed and can fight back? what's your view of that? >> i believe that we have our military police and others that are armed. and i believe that's appropriate. and i think that, i believe, that allows us the level of protection necessary. although we carry arms quite regularly overseas when we're deployed and do it on a regular

basis, i believe back here in the united states it's more appropriate that we leave it to that, sir. >> do you agree with general odeirno, congressman? >> i do agree. i think the army knows the army business best. i have a high respect for general odierno along with general milly at ft. hood. and they both agree allowing concealed carry weapons on the post would not be the best interest of the soldiers or security. >> what changes have taken place, if any significant changes, on the base at ft. hood over the past five years since the mass murder committed by major nadal hasan? >> i'm sure there are many. i know of a few. even though it is the policy of the army to have a relationship with the surrounding community, it's good for the soldier, it's good for the community, so we do try to have open access

available to the community people. and so -- but they still do have -- you have to have a reason for going on the post. you have to ask permission under certain circumstances. and at the gate they ask your reason for visiting the post. and if you say in your meeting with someone they call that person, i experienced it all the time, if you're a regular traveler in and out, you can get a special sticker. those people are checked out. >> as you know, congressman, when u.s. troops were deployed to iraq -- they're no longer there, but when they were over a decade, soldiers from the u.s. army were deployed at least for a year or 15 months. that was the normal rotation. when i heard that specialist iri ivan lopez was deployed for four months, that raised some red flags in my mind. i don't know if you've looked into this, but what does it say to you he was brought back home after four months? >> well, it raised red flags for me. first let's realize he was there

as we were basically exiting the country. so he was in the standdown that occurred at that time. that may be part of the reason. of course we now know that he had depression and anxiety issues that he was being treated for. that might have been part of the reason. i guess we'll ultimately find out i expect the army to give us a reason for that. but i can't tell you that i know it for sure. i can only speculate. >> representative john carter of texas. thanks very much for joining us. once again, our deepest condolences to the families in your district in and around ft. hood, texas. thanks very much. we'll stay in close touch with you. >> thank you. pray for ft. hood. thank you very much. >> we certainly will. it's a mystery like no other in the world. many nations are working right now to try to find the missing malaysian airlines 777. up next we'll return to the base for the massive search. we're going to hear what the leaders of australia and malaysia have to say today.

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and ask us all about our auto features, like guaranteed repairs, where if you get into an accident and use one of our certified repair shops, the repairs are guaranteed for life. so call... to talk with an insurance expert about everything that comes standard with our base auto policy. and if you switch, you could save up to $423. liberty mutual insurance -- responsibility. what's your policy? welcome back. i'm wolf blitzer reporting from washington. there are a number of new twists and turns in the search for flight 370. here's what we know right now. officials coordinating the search in the southern indian ocean will soon make a major announcement. so far officials aren't revealing the nature of the announcement, but they do describe it in their word as big. we've also learned that a british ship in the search zone will be conducting what they

describe as a specific search in the coming hours. it's not clear what they're zeroing in on right now, but we'll of course continue to work our sources. the search zone has shifted yet again. this time a bit to the north. officials say they're refining the zone based on continuing analysis of satellite communications and the plane's capabilities. in just a few hours search crews will get some high-tech help. the australian vessel, ocean shield, is expected to arrive carrying a device that could help find the pingers on the data recorders. the batteries on those pingers are expected to run out in about four or five days. today, australia's prime minister called the search the most difficult in human history. and his malaysian counterpart vowed he'll never give up until answers are found. the two leaders met in perth, australia, that's where the search operation is based. our kyung lah is there. >> reporter: side by side the prime ministers, one representing the search and the

other the investigation into why malaysia flight 370 vanished. in a choreographed photo op through the australia air base they thank troops from eight nations repunted relentlessly over the remote indian ocean for more than two weeks. but what neither leader could give was any real direction on the location of the missing plane. >> we cannot be certain of ultimate success in the search for mh-370. but we can be certain that we will spare no effort, that we will not rest. >> the search era is lost and the conditions are not easy, but a new refined area of search has given us new hope. >> reporter: malaysia's prime minister arriving here at the base in australia as the families of the passengers continue to blast his country for its poor handling of the

investigation. the most vocal, the chinese families. malaysia botched this from the beginning says steven wang whose mother was on the flight. >> flight heading to beijing but it turns west and flying over the whole malaysia for more than one hours but they didn't take any action. it was ridiculous. >> reporter: the malaysian government maintains it is doing all it can. and after a meeting with families yesterday, the country's civil aviation chief insisted he'd answered all of their questions. >> i think overall they haven't handled it well. i think they're improving significantly in the last week or so. but early on definitely not. >> reporter: malaysia's prime minister refused to field any reporter questions the entire time he was in australia offering no answers. or hope for how long this hunt will go on. kyung lah, cnn, perth, australia. >> cameras have helped shed

light on accidents involving buses and trains, what about planes? the malaysia airlines mystery has renewed the debate over cameras in the cockpit. you're going to hear the arguments on both sides when we come back.

the search for malaysia airlines flight 370 is heading into day 28. crews are racing gengs the clock to try to find the plane's so-called black boxes. they hold the best clues about what happened to the plane and the disappearance of flight 370 has reignited the debate over putting cameras in the cockpit. stephanie elam investigates. >> reporter: as pilots guide commercial planes across the skies, everything they say is recorded. but unlike other modes of transportation, we can't see what's happening at the controls. cameras have shed lights on accidents like when this bus

driver was caught on surveillance camera texting just before rear ending an suv. cameras are also keeping an eye on train conductors. and now the missing flight of 370 has reignited the debate of cameras in the cockpit. >> the amount of information they're deriving exceeds anything. >> reporter: cameras would be intrusive he says. why not put cameras in the cockpit of commercial airliners? >> i want the pilot worrying about flying the aircraft. and current technology allows you to monitor so many other parameters of the aircraft that it's not necessary. >> reporter: in 2000 the national transportation safety board recommended the federal aviation administration require airlines to record electronic images, data that would be included in two redundant cockpit data recorders, one in the front of the plane, another in the rear. but in the last 14 years that

recommendation has gone nowhere beyond being a suggestion. >> this information would be limited to accident investigation use and otherwise would not be available for viewing by anyone. >> reporter: jim hall was chairman of the ntsb when the recommendation was made. after the investigation of several crashes found there wasn't enough cockpit data to determine what went wrong. >> the cameras would not be on the face of either of the pilot or the co-pilot. they would focus on the instruments and on the manipulations that are made. >> we constantly see the edging and edging more towards taking away the privacy of our pilots. we're performing our job up there. i would rather be focused on doing my job than what people are seeing. >> reporter: yet safety as a higher priority than pilot privacy. >> i hope that we won't wait until we have a similar incident involving a united states

airline and united states citizens to take the action that's necessary to provide for the safety and security of the traveling public. >> reporter: stephanie elam, cnn. >> let's bring back our panel again. our aviation analyst mark weiss and peter goelz and tom fuentes. what do you think, cameras in the cockpit good or bad idea? >> i was there at the board when we recommended it. i'm in favor of it. i think it gives an extra added piece of evidence on exactly what was going on. i can think of a number of accidents where a camera in the cockpit would have been very useful. >> mark, you're a former 777 pilot, what do you think? >> i have mixed emotions about it quite honestly. as long as it's not being used puniti punitively, i think you can gain a lot of information from that. i think at this point it would behoove both to start having a

real serious dialogue about how to come to a conclusion on this. >> because stephanie points out if you've got cameras for bus drivers, for truck drivers, for trains, why not for planes? >> right. using this case as an example, if they get the flight data recorder some day, if the voice cockpit recorder has been written over and therefore has no real information of what happened at the time the plane turned, you're going to know the plane went up, down, sideways, north, south, all of that, where all the settings were on the aircraft. but you won't know positively who was controlling that aircraft. and really only, you know, even if you come up with a variation of a video camera system, put a camera up there when the cockpit door opens it clicks on and records who's coming and going. just so you'd know that there's no other intruder. that once that cockpit door shuts at takeoff time, that's it. you would know if someone else came in there. right now if we recover this data from this flight at some point, we may not know who was in that cockpit that made the

plane do all the movements. >> and here's the technology as we all know is there, not only to stream live all the information that goes into flight data recorder, the cockpit voice recorder, so in case of an emergency the plane disappears at least you have that information that investigators can then review. but the technology is also there to stream video images live back to some ground control place and hold it, not release it, but only use it if necessary for an investigation. i don't see anything wrong with that, do you? >> no. and pilots are concerned that it's going to be used punitively. >> but what if there's an agreement it's only used if the plane disappears and we have to find out what was going on inside that cockpit in the hours before the disappearance -- like the case with flight 370 right now? >> absolutely. and the protection of the voice recorder has been pretty ironclad over the past 30, 40 years. i think the same protections can be applied. >> will the pilots associations

agree to this, you think? >> i think there's going to be a great deal of pushback. so i really believe that you're going to have to come up with some compromises on both sides to make this work. >> what if it's only used in a case like this? they'll have all the information, but if there's a disappearance of a major airliner with 239 people on board at that point they go to the videotape. >> well, you know, personally i believe in that. remember, we have families too. we want to come home. we wouldn't want to leave them in the same feeling that these poor families, these 239 families are. >> you know, workers at a casino are under camera the whole time they're working. and they don't have 240 lives in their hands. >> yeah. i think it sort of makes sense. you know what, the international airport transport association are engaged in a task force to come up with recommendations over the next six months. let's hope they come up with a good strong recommendation on this. we'll see where we go. we've got to learn lessons from what happened. >> we do. >> in this particular case. just ahead, congress versus

the irs over allegations of targeting conservative political groups. a former official with the tax agency could end up in a lot of hot water right now. lawmakers are about to vote. standby. lobster entrees, selection of like lobster lover's dream. hurry in and sea food differently. go to red lobster.com for ten dollars off with purchase of two lobsterfest entrees. this is mike. his long race day starts with back pain... ...and a choice. take 4 advil in a day which is 2 aleve... ...for all day relief. "start your engines" [ male announcer ] when fixed income experts... ♪ ...work with equity experts... ♪ ...who work with regional experts... ♪ ...who work with portfolio management experts,

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breaking news coming from capitol hill. house republicans are planning a vote on whether to hold a formal irs official in attempt from

congress. he has the details and this stems from the irs targeting conservative groups. what is the latest? >> that's right, wolf. this was a huge story last year and the latest development in it. cnn first got word about this a short while ago. house republicans are planning to vote in committee next week on whether to hold lois learner, the former irs official in contempt of congress. learner has refused for the testifying of conservative and tea party groups and looking like she will face i contempt of congress charge. this goes back a few years. they ran the tax exempt organization division and as many conservative groups were delayed in the application and later we found out that.

i are, s was looking for terms like tea party and pulling them out of the line and by delaying the request. they are trying to see if there is a link between the i are, s and anyone else in the administration. was there a targeting from the white house and there has been no proof that such a targeting existed, but lois learner has not testified and now darrell issa is pushing her to say she will face contempt of congress if she decides had to no the to. >> doesn't she have the right to remain silent and her lawyers think it could be incriminating? that's a constitutional right, right? >> that's onest thi of the thint makes it more fascinating. here's the thing.

before she invoked that right, she read a statement saying she was innocent. she had done no wrong. by reading that statement, how republicans and in fact the house council, the attorney for the house of representatives have found that she waved her first amendment right and she cannot in one part of the statement give some testimony in that case saying she did nothing wrong. right after that invoke her fifth amendment right. they are arguing it is either fifth amendment all the way or nothing. her attorneys disagree. what we have is a case about politics and also potentially disturbing targeting of political groups. we have a tremendous constitutional case over what the fifth amendment right does here in congress when you are testifying. >> lisa, thanks very much. given the republican majority on that, i assume the final vote if it happens is a foregone conclusion. we will see what happens. thanks very much.

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. the most difficult search ever in history. that's how australia's prime minister described the race to find malaysian flight 370. now the british echo the survey ship is to hone in on a specific area off the coast of australia. even if it's found, how much of the plane could be salvaged? our randi kay takes a look at the technology and the challenges involved. >> this is what it looks like trying to recover an airplane in the ocean. you are watching a navy salvage team gathering pieces of flight 800 that went down off of new york. here divers are maneuvering

among pieces of the twisted wreckage. >> the navy has recovered an intact helicopter from about 17,000 feet. they have the capability and they have done this before. >> the retired navy captain has been involved in at least ocean salvage operations including twa 800 and swiss air flight 111 which crashed in 1998 off the coast of nova scotia. those were both in water much shallower than the indian ocean, but the navy has vehicles designed for deep water salvage operations. the slower the process. >> it takes about an hour and if you are going to 11,000 feet, you can count on 11 hours to get down. >> at those depths, it's pitch black. the under water vehicles are equipped with lights and cameras and outfitted with sonar to

scout for debris. they are steered by two operators on board the ship above who use instant feedback from the salvage vehicle's cameras to direct the ro robotic arms. >> they can hover and move left, right, forward, and back and go to where they may care ofly do it if they need to. >> remember the crash in 2009? two years later an unmanned you should water vehicle found the debris field for the flight 13,000 feet beneath the surface. the engines were pulled and if flight 370 is found, search teams are prepared to do the same. >> if it's small like the black boxes, you can put a basket on the rov and the arms can pick it up and put it in the basket. >> the remote under water vehicles can only carry about 4,000 pounds. anything heavier like a piece of

the fuselage will have to be a catched to a cable and pulled by a crane on the ship. keep in mind this could be happening miles below the surface. incredibly difficult task. still, no doubt salvage teams will keep their eyes peeled for the black box, hoping to get much needed answers first. randi kay, cnn, new york. >> queen elizabeth ii paid a visit to the vatican today. they are about a half hour. they exchanged gifts and we hear that the queen gave the pope a basket of food. the queen reportedly received a small globe for her new grandson and a personal parchment scroll. there they are.

>> thanks for watching. i will be back at 5:00 for a special two-hour edition. for now, let's turn it over to brooke baldwin and don lemon. good afternoon. one of the main entrances. two major stories this afternoon. the first here in ft. hood where an entire military post is grieving. trying to understand why one of their own, an army specialist attacked his own piers. >> time is running out on the hunt for flight 370. it moves and the black box battery life runs out. the prime minister said this is the most difficult search in human history. we will get to all of that in a moment.