♪ welcome back to our continuing coverage on the search for missing malaysian airlines flight 370, i'm rosemary church, and i'm errol burnett, thank you for joining us. >> well after a month of frustration, and searching for the plane, and evidence, they could be in the right area. >> the latest signal is that more audio signals in the indian

ocean. >> australian ship, ocean shield detected two pingers. one the leader on of the search said it could take days to confirm it. >> joining me now at the base of operations is cnn aaron mclaughlin's, this is the news for those viewers who are perhaps just joining us in this hour. i think it's critical, erin, that we go through the breaking news that we received about three hours ago now from perth f australia and the search chief. >> rosemary, they have detected not one but two, it happened in

more shallow waters, and the second signal lasted 13 minutes. both consistent with the characteristics of the voice recorder and the inflight data recorder. take a listen to what angus houston has had to say, as he tried to characterize the discovery in a press conference earlier today. >>. >> clearly this is a most promising lead. and probably in the search so far, its the -- it's probably the best information that we have had. and again, i would ask all of you to treat this information cautiously, and responsibly until such time as we can provide the unequivocal determination. >> ocean shield is still in the

area with the signals, using the towed pinger locater to try and find a third signal. that process should take 24 hours according to houston if they are successful in finding a third acoustic event, and then they will deploy the blue fin 21. and underwater vehicle in the area to try to actually find physical wreckage. there's no physical debris being found. the authorities are saying that there's so many leads that were dead ends. but analysts are saying this has to be it. how did angus houston answer those questions that journalist

saying that if it isn't the black boxes from mh-370, what could it possibly be? >> he did point to the fact that sound travels strangely in these deep ocean waters. so they want to be certain, he is insisting that they find the actual wreckage, and that will be verification that this is in fact, the missing plane. rosemary? >> and that is is certainly the next part of this investigation. it's just after 3:00 in the afternoon in perth, australia. thanks to you, errol? >> how are families of passengers reacting to the latest developments. the story broke, and the relatives, as we have been talking about now, they have seen debris in the south china sea and the southern indian ocean all turn out to be

nothing. i'm curious how relatives are responding to this news? >> it's been a roller coaster ride for them. and they have had their ups and downs and their desperations today, some were already saying with this news, i have lost hope. others hear the news and they want to believe it and they say, i'm not convinced until and unless we get that evidence that we heard there from the air marshal, houston telling us that it will take several days before they get a visual on the wreckage if there's wreckage down at the flight. and then you have have others that perhaps are still clinging to the impossible belief in all of the theories that sprouted out, remember, they have been pu pummeled with this, they have had reports of the wreckage a as

you noted. >> social media sites have been different scenarios, cannot imagine what it has been like for the relatives. talk about the change you have noticed in the past month and, you mentioned there, that without the new information. many relatives had given up hope that anything would found. >> they had, just because of the length of time that has passed with no news, with no positive news coming there way, they feel that things have have been covered up just because there has been no information. none. this has been one of the most

unlucky searches that i have ever seen. i have covered a lot of the situations where there was certainly a lot of questions being raised constantly, and the facts were hard to come by. but this has been an impossible situation. where you have to wait for the evidence, you have to wait for the facts in a vacuum. while all of the other theories continued to cascade down through the internet. and i think that this has been very, very difficult for the families. and i think in the past month we have learned a lot about how the stories are reported and how false hopes can be raised and now for the first time, it seems that we have clues that point to real evidence.

indeed the families need to wait a few more days. jim clancy live for us. rosemary. >> errol, these new audio signals were detected, and they were racing against the clock to try to find the black boxes before the batteries inside the becons go silent. aviation analyst michael kay and and liz aben, joined us a short time ago. take a listen. sglipt to start with you, michael and get an idea of what you make with this and how cautious you were being and on you encouraged you are being as well? >> all of the above, i think the reality of this is that what we have seen so far since day one, has rewritten the history book in terms of the way of crash

investigations will be done in the future. we have effectively bypassed the haystack and zoning in to needle. which is unprecedented in accident investigations. however, we do need to maintain this that element of cautious optimism, yesterday, during our chief master houston's press conference, i was optimistic and having heard what the air marshal said today, i'm more optimistic than cautious and there's reasons for that. at least two to three days to go, having spoken to commander william marks earlier on about an hour ago they have to go and do three runs before they can triangualate and fix that point and that takes a long time.

>> what do you make of the announcement that angus houston made, he is not confirmed this is mh-370, the second detection, to separate audio signals that are consistent with the black box, he is getting as close as possible to confirming, would you say? >> i mean, as a pilot, we tend to be skeptical, but i have been very optimistic. it sounds like this is the airplane. it was unprecedented in how it has been discovered as opposed to other accidents. >> and michael kay, incide wanto back to you, i want to revisit the idea that the journalist brought up in the news

conference, if you can't go ahead and say, it's mh-370, what could it possibly be? >> i'm not sure there are too many natural things in the ocean that could emit these type of signals. i think what we are seeing is consistent and that language was used by the air chief marshal himself, it's consistent with the type of noises that we would hear from two black boxes and that is obviously the cockpit voice recorder, the cvr and the flight data recorder, the fdr, because this information and the signals are so unique to what it is that we are looking for under pinned by the unique analysis from the satellite and the intellectual horse power that went in to that, i think we are now in a very credible position to be able to start, you know, really zoning in on this, this location and hoping for the

best. >> that was michael kay, speaking to myself and rosemary church earlier, as we have been reporting, it's been a agonizing month for the families and relatives of those that were on the flight mh-370. pauline, talk to me how the families are responding to the new development and what they have planned for what is now the one month anniversary of this plane going missing? >> sure, errol. well, as a general sent iment, they are approaching it with a lot of caution, they have been disappointed so many times with false leads. one woman whose husband is on the plane said she has no reaction until she sees physical proof until that she said this all means nothing. and i was listening to what jim clancy was saying about what

relatives there were saying. i could echo the same sentiment here among the relatives. among the most part many are cautious and they want data. and they are for the most part realistic and many are preparing for bad news, and there's that one small group that is saying, i won't believe it until i see it, and until then, i believe my relatives are alive. we have seen this theme though of caution throughout the weekend. and earlier, i had spoken with a man whose brother-in-law is on the plane. here is what he had to say about the initial reports of the pings. >> translator: i feel the news from the press conference could be true, because the area is where the plane should be. it's so strange that there was no emergency beacon signal. i think the plane glided to the water and sink so the beacons were not activated.

>> reporter: so you are hearing some relatives now beginning to accept the possibility and the possible reality that this plane has ended up in that area of the indian ocean. now you ask anded me what is planned for tonight. keep in mind, today is april 7th, the plane disappeared a month ago tomorrow. and after midnight tonight at 12:41 exactly, a.m., the relatives are going to be having a candle light vigil until 8:11 in the morning. now 12:41 was when the plane took off for beijing, 8:11 is when the last satellite ping was detested. so, we are planning to be there, this will be a very emotional moment, i have been in the room where the relatives meditate and pray. it's heartbreaking when you see the handwritten notes on the wall there.

tonight, they will all come together again to mark the one-month mark. >> it's stunning to think, pauline, i don't think that any of them, as none of we thought one month on, there would be no confirmed debris. now, it's stunning. the malaysian airliner debris, if there is debris, there will be difficult salvage work involved. >> we will look at the salvages likely to be involved. that is ahead, do stay with us.

we will bring you up to speed on our breaking news, australian officials say a towed pinger locater has picked up more audio signals in the

southern indian ocean, they say, it could take days to confirm if the pings were from malaysian flight 370. they are saying it't difficult search, if they can pinpoint where the plane went down, how much can be salvaged. >> this is what it looks like trying to recover an airplane, you are watching a u.s. navy salvage team, gather pieces of twa flight 800, down in new york in 1996. divers are maneuvering. >> they have the capability and they have done it before. >> retired navy captain, has been involved in at least 50 ocean salvage operations. including twa 800 and swiss air

flight 111. which crashed in 1998 off the coast of know vary scotia. >> there was remote underwater operations. they can go as deep as 20,000 feet, the deeper the recovery, the slower the process. >> it takes about an hour for every thousand feet that you need to descend. 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 vehicles are equipped with lights and cameras and they are outfitted with sonar. we use instant feedback from the salvage cameras to direct the robotic arms.

and go to where they need -- two years later, a unmanned underwater vehicle found the debris, and it was pulled from the ocean floor, if flight 370 is found, teams are prepared to do the same. >> if it's small, the arms of the rov can pick it up and put it in the basket. >> but the remote underwater vehicle can only carry 4,000 pounds. it will have to attach to a cable and pulled to the surface by a crane on the ship if it's larger. keep in mind, this could be happening miles below the surface and incredibly difficult as a task. no doubt the salvage teams will

keep their eyes peeled for the black box hoping to get much needed answers first. randi kay, cnn new york. >> if the search does not pan out, how much further can the search go on? >> at some point, i have to believe cost becomes a factor. who is going to foot the bill for this going ongoing forward? >> well that that is something that i wondered, i'm familiar with the cost of searching the ocean and doing the deep sea work. i might understand, if this does not turn out to be the location, it hope it does, but it does not turn out to be the location, and we are back to square one, which is this shifting search area, it seems all the time. could we find it, the answer is, if resources were unlimited, yes, we could. because we have the 21st century

ability to sense and map the bottom of the ocean in greater detail. it turns out that we have better maps of mars than the bottom of our own ocean and we can send submercibles in the ocean. if we put everything in the indian ocean over the next year, we would find it. that would be very expensive. malaysia does not have that kind of money. these are the questions that arise in my mind, how are you going to fund a longer term effort? >> and rosemary, what the expert said, we have better maps of the sufficiency of mars than we do -- maps of the surface of mars than we have of our ocean as. that says a lot to me. >> we will update you with the latest finding on the other side of the break.

this is cnn. breaking news. for those of you who just joined us, here is the very latest in the search for malaysia airliner 370, a pinger locater has detected more audio signals from the southern indian ocean. >> we have been you can thatt-- have been talking about it for the past few hours and they are consistent with the recorders. >> two distinct pinger returns were deteched which could very possibly be from the missing airliner's two separate black boxes, but people are being cautious and you can hear, we are using cautious language here. the leader of the search operation is he had

operation said it could take some days to confirm whether indeed the pings are from the flight 370. >> sam? >> this is the time of year, where we are still wrapping up tropical season heading in to fall. we have had a number of tropical systems that were brushing the area as of late and it's the time of year in the western pacific, a lot of activity in the last 48 hours or so with heavy rain across parts of the western pacific. and jillian, we were talking about that two weeks ago when it formed here and moved right into the newest search area, right into the northern end of it and that cyclone could have impacted any debris that may have been floating on the surface of the water at the time. now ivanho, a weakening tropical storm. bringing in clouds and showers from time to time, and also, bringing in the winds here in

the search area, so, that could have an impact on the search zone as we continue to see these outer bands spiraling through the winds picking up here as we head in to the next 36 hours. that means the waves we are expecting, to be 3-5 meters. so, we have been lucky that these storms have skirted the area, and still having an impact on the ocean waves and the visibility, as they continue their search. >> many thanks to you, samantha. well, today's developments -- >> we will hear from other experts about the underwater search for audio signals. stay with cnn. your education is built to help move your career forward. here's how: we work with leading employers to learn what you need to learn so classes impact your career.

while helping ensure credits you've already earned pay off. and we have career planning tools to keep you on track every step of the way. plus the freshman fifteen, isn't really a thing here. and graduation, it's just the beginning. because we build education around where you want to go. so, you know, you can get the job you want. ready, let's get to work.

this is cnn breaking news. >> welcome back to our continuing coverage of our search for missing malaysian flight 370, i'm rosemary church. >> thank you for joining us, let's bring you all the information that we know at this hour, with days or perhaps when the batteries are set to expire. it's been a weekend of news for the flight. >> let's go over the latest d m

developments. pinger locater has detected signals. >> the signals were picked up in the northern part of the search area by the australian ship, ocean shield, two distinct pinger returns detected which would be from the missing airliners to black boxes. >> still, as we said before, it could take days to confirm whether the sounds are indeed from flight 370. the chief search coordinator revealed those findings we have just mentioned a few hours ago. here are highlights from his press conference. >> today, i can report some very encouraged information which has unfolded over the last 24 hours. the towed pinger locater -- locaters deployed from the australian defense vessel, ocean shield has detected signals

consistent with those emitted from aircraft like boxes. two separate signal detections have occurred in the northern part of the search area. the first detection was held for approximately 2 hours and 20 minutes. the ship then lost contact before conducting a turn and attempting to reacquire the signal. the second detection on the return leg was held at approximately 13 minutes. on this occasion, two distinct pinger returns were audible. significantly this would be consistent for transmissions from both the flight data recorder, and the cockpit voice rd recorder, need to be honest with you, it could be days to establish where the detections can be confirmed as being from

mh-370, in very deep oceanic water, nothing happens fast. the satellite has essentially given us this area here as the most likely place where the mh-370 entered the water. yesterday, a couple of days ago, we had an encounter with the electronic pulse in this election here. >> and you have been listening to search chief angus houston. we are bringing that to you since -- they detected two

signals that could be from an airline's flight recorder and officials say they now can start an underwater search for any sign of wreckage. >> we have been reporting on the capabilities of the towed pinger locater. the device that detected the signals overnight. and also, we were at the manufacturer's facility in maryland, the place that has made this device, and also has manufactured the blue fin 21, which is the torpedo like device that gets sent down after the pinger locater detects signals. it has a lot of capability. it can detect signals in two miles away. and it can go down as far as 20,000 feet below the surface of the ocean. without a confirmed piece of wreckage, it's more difficult for the ping approximator locater to find a signal. if this is indeed a signal from

the black box. it's an extraordinary device. and what will happen next, very likely is that the teams will deploy, which is an underwater vehicle, that looks like a torpedo when it goes down to depth. it takes pictures of the area where they feel it could be found and it tries to find the black box and the debris field so that will likely be the next steps. >> and brian, we heard from the chief coordinator. as he made an announce pt two hours ago, that they still, i think he said it tests the limits of the technology. it's roughly 15,000 feet deep, and we are also a month out from when the plane went missing. it's possible that the batteries have run down, even with testing the limits of technology, what use will the pinger locater be

and the submersible vehicles be if the batteries died and there's no signal? >> it will be tough, but it can narrow the search field, they can go back to where the pings over the past day were detected and it can zero in on that area. and at that point, they can deploy that underwater vehicle, the blue fin-21 to go down and take actual picture images of it. it will not be video, it will be still pictures and also, maybe sonar capability that that has. and it may be able to detect other audio signals. so, that is key, when they deploy the blue fin-21. to go down where the area where the signals have been detected. it can take actual visual images of of what is down there, and transmit them to the vessels on the surface. and as you heard, the search

coordinator talked about, it may take days to deploy that, and get it in to the area where they detected these pings. >> as you can see, the search now takes on a new direction. authorities are encouraged, but careful. searching for anything beneath hundreds of meters of water is not easy. that's an understatement. and let's bring in an oce oceanographer, his firm is taking a role in the search for 370. detail for us the difficulty of looking for anything in the depths of the southern indian ocean and tell us how your firm is helphelping? >> well with -- well, the ocean is an area and a system which is swirling clockwise,

anti-clockwise and that can affect the material from the aircraft in different directions. that is three dimensional situation. and you have to keep in mind, you know, we are a few weeks in to the potential crash, and therefore lots of material can be in various directions. that is really the complexity that the ships are facing. >> you make it sound impossible and add on to the fact that it's common knowledge now, we know more about the surface of mars and pick your planet than we do of our own oceans. how then is your firm helping and how will this detection of pings help this search research some kind of finality? >> well, our firm is the

australian mission science agency. we are a classic government agency in australia and we are committed to assisting the safety authorities in their search. what we are doing specifically is not so much focused on the ping itself, but to provide the information. we are specialists in our field, in our course, and so we know how the currents are flowing. we can model the currents. that is the most important part, you can actually predict to some extent at least, the objects that might have been effected. and you can back track. you can also backtrack to the original site and see in time when the plane crashed. we have them available to us, which is similar to the --

>> so how much movement is likely to have happened in the areas being searched now. the vessel had two audio pings over the weekend, it takes a long time to move the pinger locater to place and from where they are searching, and it will take days, to maneuver all the pieces, so where we are talking about, in the southern indian ocean, how likely is it that the currents carry things over the next week. >> one has to discriminate between the materials that float, and stays at or near the surface and those that can move hundreds of kilometers from the crash site and there's material that sinks to the bottom, like the flight recorder, for instance. i mean, in the latter case, i think there could be a spread. reports of new currents.

you could expect that the material from the aircraft to be close and gathered around the site of the live recorder. the situation is different. >> all right, that is andreas shiller, thank you for your insight. >> we will have more ahead on the developing search for flight 370. >> there's calls for cameras in the cockpit of commercial aircraft. and oscar pistorius is back in court for his murder trial, why he likely will not be the defense's first witness.

so let's look at the

breaking news we have been covering, australian search officials say a towed pinger locater has picked up more audio signals in the southern indian ocean and they say it could take some days to determine whether the latest sounds are from malaysian airlines flight 370. >> and now, some people are suggesting putting cameras in cockpits so authorities can see what happens at the time of an accident. >> we are descending to 3,000. >> as pilots guide commercial planes across the skies, everything that they say is recorded. but unlike other modes of transportation, we with can't see what is happening at the controls. cameras have shed light on accidents, like when this bus driver was caught on surveillance camera text thing before hitting an suv, cameras are watching train ku ining con

this had has reenergized putting cam a ras in the cockpit. the coalition of airline pilots association said that cameras would be intrusive. >> i want the pilot worried about flying the aircraft and the second thing, is current technology allows you to monitor so many more parameter of the a aircraft, it's not necessary. you will know the altitude and speed and everything mechanically interest the aircraft. >> in 2000, the national transportation safety board recommended that airlines record images. but in the last 14 years the recommendation has gone noerp beyond being a suggestion. >> this information would be limited to accident investigation use. and otherwise, would not be available for viewing by anyone.

>> jim hall was chairman of the n ntsb when the recommendation was made, after the investigation of several cashes determined that there was not enough cockpit data to determine what went wrong. >> the cameras would be on the instruments and on the manipulations that are made. >> we see the edging and edging more towards taking away way the privacy of the pilots. we are performing our job up there and i would rather be focused on doing my job than people seeing me. >> i hope that we won't wait until we have a similar incident resolving a united states airline and united states citizens to take the action that is necessary to provide for the safety and security of the traveling public. >> cnn.

>> now should you have to step away from the television at any point today, you can see the latest dwoms on this and other breaking stories. >> that is at cnn.com. more right after the short break. stay with us. we will be right back. peoi go to angie's listt for all kinds of reasons. to gauge whether or not the projects will be done in a timely fashion and within budget. angie's list members can tell you which provider is the best in town. you'll find reviews on everything from home repair to healthcare. now that we're expecting, i like the fact i can go onto angie's list and look for pediatricians. the service providers that i've found on angie's list actually have blown me away. find out why more than two million members count on angie's list. angie's list -- reviews you can trust. ♪ legs, for crossing. ♪

feet...splashing. better things than the joint pain and swelling of moderate to severe rheumatoid arthritis. if you're trying to manage your ra, now may be the time to ask about xeljanz. xeljanz (tofacitinib) is a small pill, not an injection or infusion, for adults with moderate to severe ra for whom methotrexate did not work well. xeljanz is an ra medicine that can enter cells and disrupt jak pathways, that comes with ra. xeljanz can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers have happened in patients taking xeljanz. don't start xeljanz if you have any kind of infection, unless ok with your doctor. tears in the stomach or intestines, low blood cell counts and higher liver tests and cholesterol levels have happened. your doctor should perform blood tests before you start and while taking xeljanz, and routinely check certain liver tests. tell your doctor if you have been to a region

where certain fungal infections are common, and if you have had tb, hepatitis b or c, or are prone to infections. tell your doctor about all the medicines you take, and if you are pregnant, or plan to be. taken twice daily, xeljanz can reduce the joint pain and swelling of moderate to severe ra, even without methotrexate. ask if xeljanz is right for you. >> the federal reserve releases minutes from the policy meeting on wednesday, the was the first with the new chair woman at the helm, during it, the policy makers opted to reduce stimulus by another $10 billion a month. that was not surprising. but investors were off guard after the press conference, it was hinted that interest rates could go up sooner than hoped.

and it's expected to be another big week for ipos. about a dozen companies are execed to make their public debuts on either the nasdaq or the new york stock exchange this week. most note ably allied financial. finally, tuesday marks the end of an era for microsoft, it's when the company will stop issuing security updates and end almost all technical support for its 12-year-old xp operating system. the system is in use on a third of computers around the world. it does not mean they will stop functioning but they will be more vulnerable to malware and viruss. it's recommended that a copy of windows 8 be bought if your

computer is new enough to support it. >> we will check the other stories we are following this hour. >> and we start with this, mickey rooney died sunday at home, he was 93 years old. he rose to fame as the all american boy in a long running series of films for mgm, he worked in silent movies before becoming a huge draw. he went on to become a star all over the world. he began performing with his parents in 1922 before he was 2 years old. >> after a week's pause, court is back in session for oscar pistorius, live pictures here from inside the court room, the defense team will now have their chance to try to show that the death was an accident. the prosecution of course, said, it was premeditated murder, in a surprise move, pistorius is not

the defense's first witness. a path ologist is on the stand first. so, let's get more information on what is going on now in the trial and kelley phelps, kelley, give us an idea of why the defense decided not the start with pistorius at this point. >> well it was -- this morning as was reported in media reports. that pistorius has a family emergency that he needs to tend to. and that was put forward in court this morning and the judge asked if there were any objections to that and there were none. and the defense team then indicated that after the pathologist they would pro seed with the normal order of events. that tells us that it's likely

that pistorius will be next. and after the court's determination, they will treat it as if pistorius has testified first. they are making an allowance for this. >> let's look how critical it is for the defense team to get pistorius to talk and explain his side of this, and how it's panning out so far, what are people feeling, i mean, everyone knows that at this point, he killed her. but it's a matter of of whether it was an accident or whether it's premeditated. >> his defense has relied on his own state of mind and what his situation was at the time. he has claimed that he genuinely but mistakenly believed that there was an intruder and he was acting in order to present his

life. in a situation of that nature, when you are relying on what a person thought themselves, it for that person thenlzs to take the stand and give their version of events. at that point, you arely on whether they believe his version over that put forward by the state. his own testimony is crucial to his defense. >> okay. thank you. >> and now to this. prince george, and his parents the duke and duchess of cambridge touched down in new zealand. it's the first trip for the future british king. let's bring in max foster who is traveling with the them. it's all well to have the duke and duchess there.

have the royal couple decided how visible the royal baby will be? >> well, he was relatively visible today, he arrived in the airport and actually, the australian media managed to get pictures of him as he transferred flights in sidney. the big reveal was meant to be in wellington. i was there as they came off the plane and he, you know, he acted calmly, he did not sort of freak out in any way. he had been on a 25 hour journey. he can did well wi. certainly is, he is the star of the show. it's a significant moment in history. he has a lifetime ahead of him. he will look back on this, and it will be a significant moment in his life. we will not see a huge amount of

him, there's a couple of occasions in new zealand and in australia, where he is due to come out and meet the press. his mother and father careful to not to expose him too much to the media. >> of course, as an australian, this is reminiscent of the trip back in 1983. prince george is close to that age, a lot of similarities with this. the expectations from seeing the baby and also, the duchess of cambridge, very popular and tell us more about the similarity and the chatter about the queen not wa wanting to see people scrambling over catherine over the prince.

>> william took his first steps on that trip all those years ago george is crawling at this point. >> we are not going to have that type of moment. the rug out lawn. that is just not arranged this time. william is aware of the fact that this is a historic visit. he wants to do it the same way, he does not want to reflect just what his parent s did. there's less access, they are more careful of how to present prince george to the world. there's a republican movement in this area of the world. duchess is one of the biggest star around the world and people cannot resist seeing a baby. it will put the republican

movement back a bit. certainly i think it will play well for the monarchy if things continue a as they were today. >> looking that way, as long as you have a little baby out there. it's brought royalty, what, another 100 years of exposer. and thanks for joining us for our continuing coverage of missing malaysia flight 370, more on the latest developments in this search for the plane coming up next on teller start. coming up next on teller start. stay with cnn. ver that your skin looks better even after you take it off. neutrogena healthy skin liquid makeup. 98% saw improved skin. does your makeup do that? neutrogena® cosmetics.

breaking news this morning. new evidence that search crews may be close to finding missing malaysia airlines flight 370. just hours ago, investigators revealing american black box detectors have received new signals consistent with those deployed by the plane's flight data recorder and cockpit voice recorder. right now, search planes and boats moving in to find those black boxes before their batteries run out, and it could go silent forever. we have live, team coverage on that search. plus,