i'm going to hand the baton over to my colleague wolf blitzer. his program starts right now. hello, i'm wolf blitzer reporting from washington. are those signals detected in the indian ocean from malaysian airlines flight 370? that's the question investigators are now scrambling to answer. they're following what's described as the most promising lead so far in the search for the missing plane. authorities say a u.s. pinger locator picked up signals consistent with those sent by a plane's black boxes. the australian ship is trailing the pinger locator through the latest area. about 375 miles northeast of pings detected by a chinese ship. teams are still investigating that development. new questions are emerging about the plane's route. a malaysian government source tell also cnn the aircraft

skirted, veered off course, disappeared. the device picked up two separate signals, said to be just like those emitted by a plane's voice recorder. from perth australia, where the search efforts are based. so fill us in on the latest on what we're learning about the detection, how long those signals last, if, in fact, those signals could be coming from those two black boxes. >> yes, certainly a promising lead. no confirmation of flight 370. we know the ocean shield detected those signals over the weekend. the first one for two hours and 20 minutes. they had a lock on it for a significant amount of time. the second one, less than 15 minutes. what they're doing now is they're trying to re-establish contact, to see if they can get a lock on these signals again and try to box in the area where

they suspect these data recorders might be. >> authorities, as you know, will, they're using words like encouraged, promising. they're also urging caution, as you correctly point out. what will it actually take based on all the interviews you've been doing over there, for it to confirm the signals, the missing plane, those are signals in fact from the missing plane's black boxes? >> sure, yes, without question, there is just a lot of work ahead. first of all, they need to get a lock on this signal again. that's step number one. it's a pretty -- it's a pretty daunting task, because the ocean shield towing that pinger locator, it has about 6,000 meters of tow behind it. it takes a good eight hours to do one full sweep. that includes three hours for the ocean shield to actually make a turn and turn around the other way. of course, as we know, every minute counts here with the black box batteries in danger of running out literally at any minute. i want to play some sound from captain mark matthews. he's leading the team that is

running this pinger locator. >> what i'd like to do before i absolutely say with certainty that it is the aircraft, is one, reacquire the signal, two, deploy the underwater vehicle with the side scan sonar to map the debris field and then, three, switch out that sonar with a camera unit and take photographs of what would be the wreckage. certainly, we're jumping to conclusions here. we need to reacquire the signal to confirm it is the aircraft. >> yeah, the key word here caution, wolf, that's the message we keep getting in perth. >> clearly, the optimistic, cautiously optimistic, they may be on to the real deal. teams are also investigating the signals detected earlier by a chinese ship. that's 400 miles to the southwest. how serious are they taking those signals? >> there are a lot of questions about that. obviously, it's an interesting

location. it also falls along that arc. the satellite data shows the plane could have -- could have flown on and possibly gone into the indian ocean. there are a lot of questions about the technology the chinese were using. you saw the video of that handheld hydraphone being dunked into the water. some serious questions about whether that device could detect something so deep. we're talking about ocean nearly three miles deep in this particular area. we know the hms echo has been there doing surveillance but we haven't heard of anything significant that ship has found using more advanced technology. the real focus right now is on the ocean shield and its mission to try to get a lock on those signals once again. >> that australian ship does have a u.s. navy toed pinger locator, as they say, and that's a much more sophisticated device. will, we'll get back ton you. our panel of experts to get their take on what's being called the most promising lead so far it mike weiss is cnn aviation analyst, former 777 pilot for american airlines.

peter goals is analyst, former ntsb manager director and tom fuentes is our law enforcement analyst, former assistant director of the fbi. leapt's go around the table. we'll start with you, mark. how serious is this? how optimistic would you be based on the information that's been released? >> particularly since a lot of that information came from the u.s. authorities and the navy, that i feel a lot more comfortable with it. still, they're hedging their bet, wanting to make sure, trying to manage expectations. >> the u.s. navy did put out a statement, peter, the 7th fleet, in which they said -- let me read to you a part of that statement. the bottom line, this is the united states navy. it's not malaysia. it's not australia. it's not china. this is the united states 7th fleet, the navy. on this leg, where they're investigating right now, the pinger, the locator, the tpl, detected two signals at the same frequency but in different locations. this would be consistent with

the mh-370 black box because the plane had both the flight data recorder and cockpit voice recorder. acquisition of the the two signals is encouraging but we're cautiously optimistic pending confirmation of the black boxes and visual confirmation with the sonar. when the u.s. navy puts out a statement like that, that they're cautiously optimistic based on what they've heard at a level of 3,000 meters under sea level, that's pretty encouraging. >> it is encouraging. having worked with these guys in past stretches, they don't say things casually, that they got two pinger results back is very, very positive. separated by about 300 meters rings true for debris field. we're still weeks away. >> this is the best news -- >> if these are real, the real pinging coming from those two black boxes, why would that take weeks to find those black boxes?

>> first, you have to reacquire and try age late the location of the boxes. then you've got to drop down the remote vehicles and that is more difficult than it sounds. it's not as though they're going to run down and hit it on the first run and they may decide to do side scanning sonar which is, again, a very tedious process of mapping the debris field. so it could be weeks away before we know. >> if that beacon only -- the battery's about to go out, we're told, let's say the battery's got a few more days left. with a little luck, maybe it does. if the ping locator is within two or three miles, how difficult should it be to find that, if it's 2 or 3 -- because that's the range of what the beeping would be detectible. >> the device being towed by the ship, it may be a long way behind the ship, and it doesn't have an exact way to mark that spot. they have to come back around several times and reacquire the signal. >> just because you're hearing a

signal, if it is a signal, doesn't mean it's going to be within the next day or so. >> right, they can't say drop the submarine on that spot. they're kind of guesstimating by the depth. they can tell how far under the surface that device is but not the exact latitudlatitude, long. >> if this is the real deal, that would be amazing they locate it because they weren't sure they were looking in the right haystack looking for that needle. >> they finally found the needle hopefully rather than just the haystack, incredible. >> a a mazing development if pans out. >> the fuel consumption of the plane, the speed, it really is extraordinary if this works out, they've done a tremendous job. >> it is really very impressive. we'll know now in the next few hours once that ship moves around, the locator, sees if it can reacquire that signal. if that happens, they'll be in pretty good shape in finding

presumably at least those two black boxes. we have a lot more to digest. this is fairly encouraging. word of the best lead according to all authorities, not only malaysians, not only chinese, not only australians, but the united states navy now saying they're cautiously optimistic they're on to the real deal. up next, we'll have more on flight 370, claims that the plane was evading radar on purpose. our panel standing by to weigh in. and jeb bush sounding a bit more and more on becoming president of the united states. we'll explain. what's your function? ♪thern ♪ hooking up the country helping business run ♪ ♪ trains! they haul everything, safely and on time. ♪ tracks! they connect the factories built along the lines. and that means jobs, lots of people, making lots and lots of things. let's get your business rolling now, everybody sing. ♪ norfolk southern what's your function? ♪ ♪ helping this big country move ahead as one ♪ ♪ norfolk southern how's that function? ♪

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there's new information on the route flight 370 may have

tak taken. a source tells cnn the plane went around indonesian airspace and may have been purposely trying to avoid radar detection. how is this type of information -- why is it just coming out now a month after the plane disappeared? >> i think the real short answer here is, wolf, it's taken us that amount of time to get that information out of a senior government official here. i think it's pretty clear the investigators have had this information for a while. not quite clear how long and they've been able to draw their conclusions from it. one of those conclusions, they think whoever was controlling the aircraft was, in fact, trying to evade radar detection, wolf. >> so i guess the suspicion as far as malaysian officials are concerned, once again focusing directly on the pilot or the co-pilot in this particular investigati investigation, is that fair?

>> that's definitely fair. you look at, if you will, a triangle of suspicion. at the top end, the most experienced person, the captain, 18,000 flying hours in that aircraft. the first office really only just on a sixth flight in the 777. so his experience not so high. all the passengers have been ruled out. what they're looking at is an aircraft that's taken multiple turns. doesn't appear to be at least suffering a mechanical failure. whoever's in control tries to avoid radar detection, at least some part of the journey, before going off into a very, very remote part of the indian ocean. apparently, apparently, we have to say that, with apparent knowledge that there wasn't fuel enough on that course to get to land. that opens up so many questions of course, wolf. >> if they were trying to land some place, maybe the theory is they were trying to go to australia or some place, but there's no indication that was going on. what do indonesians say about all this, because they haven't

released any information that they actually picked up any radar on this malaysian airliner. >> yes, they're telling us they didn't pick up any radar information about this, about this aircraft. that does raise questions because they say their radar can reach about 200 miles. we're told the aircraft flew around the north of indonesia. you fly between bandarasha and the southern most point of the islands in dera. that's indian territory. we know they also have good military radar in that area. it seems impossible the aircraft would not have been picked up somehow on eindonesian radar. but that's what they're saying. a top military official went to indonesia, met with his counterpart and was told by that counterpart the plane didn't go over their airspace, wasn't picked up by their radar.

so the information doesn't tie up perfectly. there are a lot of unanswered questions. but i guess what we have here is some small gaps fills in. but the most important part i guess we could take away, again, is an inference from the malaysians about the mind-set of the person at the controls they think trying to avoid radar detection, whatever that means beyond that, wolf. >> interesting. all right. another fascinating development. thanks very much, nic robertson in kuala lumpur. let's bring back our panel. mark weiss. our cnn aviation analyst, peter goals. former ntsb managing director tom fuentes. can an autopilot make a maneuver like that? >> the autopilot has to take inputs from somewhere. when you take a look, the first turn to the southwest which went back over malaysia, which we

don't understand why the malaysians never scrambled aircraft to interset that aircraft, then took a turn to the northwest, and then again to the south. all had to be done by human input. whether it was on an fms, a flight management system, or whether it was done by changing the heading of the aircraft, and that would have been done while the airplane was on autopilot but a manual input. >> that turn away from the route towards beijing, it was supposed to go to beijing that turn happened a couple minutes after the last communication, good night malaysian 370" which raises a lot of suspicions. >> it does. the malaysians i think after just a few hours into this investigation have been focused on the cockpit. and we've all felt that this is something that needs to be looked at. because that plane was acting under human control. the indonesians, they said they don't know anything about this, they didn't pick up any radar. do you buy that?

>> that's a good question. you wonder where were the malaysians in the first place as they crossed over the peninsula of malaysia and nobody scrambled jets, nobody went looking for an aircraft intruding their airspace. now indonesia, another country, what about their defense systems as it approached? maybe the thought it went north through the water and circumvented going over land of indonesia, the one theory is they were avoiding radar but another theory is avoiding going over land where they might get shot down or going into civil airspace because of all the airports that operate all night long in that part of the world. >> how low would a 777 have to fly -- when you say flying below radar, to be not detectible. >> on the ground. >> really? you're flying at 5,000 feet, are you detectible? >> you're on radar, absolutely. >> how many miles out from indonesia before you would no longer be able to detect via radar? >> the indonesians said their

radar went out 200 miles. i honestly don't know. if they said that, they would have to go beyond the 200 mile range. >> when you see that unique turn, making a left turn, going around indonesia, then heading south through the indian ocean, and then beginning to make a little turn as if you're going towards australia, what do you say? >> you say what's going on in the cockpit, who's steering this plane? and, you know, part of it is it's on primary return. so you get out past 150 miles, it gets sketchy. it's hard to see. but still that has all the hallmarks of a plane being undercontrol. >> all right, guys, we're going to have you back shortly. a lot more to discuss. we're going to have a lot more coverage coming up on the search for flight 370. dramatic developments. the u.s. navy, the 7th fleet saying they're cautiously optimistic they may be on for those two black boxes. also, demonstrations heating up along the russia/ukraine border.

ukraine saying russia's behind those demonstrations. russia says quit blaming us. we're going to the region. stand by. ed people a question, how much money do you think you'll need when you retire? then we gave each person a ribbon to show how many years that amount might last. i was trying to, like, pull it a little further. [ woman ] got me to 70 years old. i'm going to have to rethink this thing. it's hard to imagine how much we'll need for a retirement that could last 30 years or more. so maybe we need to approach things differently, if we want to be ready for a longer retirement. ♪

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>> if russia moves in to eastern u crane, either overtly or covertly, this would be a very serious escalation. we call on president putin and his government to cease all efforts to destabilize ukraine. and we caution against further military intervention. >> let's go to russia right now. cnn's phil black is monitoring what's going on. what's russia's response to that accusation, phil? >> well, wolf, they're saying stop blaming us for all of ukraine's problems. more than that, russia's response is strong, but it has not been threatening. you could almost call it diplomatic. they're saying they're keeping an eye on those events in eastern ukraine, but what they're pushing for in that country is national dialogue with all political parties, all the regions. they say they want to be a part of it. they think the ultimate response should be a new federalized constitution that takes powers from the central government in

kiev, gives it to the regions, respects the russian language as a special language, and also ensures ukraine's status, which means ukraine can't get cozy with nato. ways lacking there, what really has changed, is the sort of language that russia was using consistently at the height of the ukrainian crisis, saying russia reserve, the right to use military intervention to protect russian-speaking pen ining peop part of ukraine. they're not saying that now, which is a significant development. from kiev, a great deal of suspicion and mistrust towards russia and any suggested solutions for this crisis that could be coming from moscow. >> jay carney, the white house press secretary, also said some of the demonstrators in eastern ukraine are actually being paid. they're not even residents of those areas. i'm sure the russians are disputing that as well. >> not in that level of detail, but this is certainly something that the ukrainian government

has been concerned about for some time now. people crossing the border from russia into ukraine with the intention of causing trouble, creating the sort of instability that could give russia the pretext to take further action. ukrainian government has said they've stopped around 10,000 people from entering the country because they believe russians were heading in there to cause trouble. russia's blanket statement is it is not responsible for the instability in ukraine. this is the fault of the new government in kiev and the fact they're not looking to respect everyone's rights and everyone's concerns, particularly the russian-speaking people and the east and the south of the country, wolf. >> escalating tensions between ukraine and russia. very serious development. phil black in russia for us. thanks very much. in a moment, we'll get back ton the search for malaysia flight 370. we're going to find out how american technology has now played a key role in what could be, could be, a huge breakthrough in the search for

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tell your doctors you are taking xarelto before any planned medical or dental procedures. before starting xarelto, tell your doctor about any conditions such as kidney, liver, or bleeding problems. xarelto is not for patients with artificial heart valves. jim changed his routine. ask your doctor about xarelto. once-a-day xarelto means no regular blood monitoring -- no known dietary restrictions. for more information and savings options, call 1-888-xarelto or visit goxarelto.com. welcome back. i'm wolf blitzer reporting from washington. there are new developments that are raising hopes of finding malaysian airlines flight 370. here are some of the latest developments. search crews are following up on their most promising lead so far. a u.s. pinger locator in the indien indian ocean detected two separate signals.

they are consistent with beacons coming from the two plane's black boxes. they could deploy an underwater vehicle to take picture to confirm the plane has been found. time though is a major factor. the batteries on the black boxes only have an expected life of about 30 days or so. the head of the joint search committee says we hope they keep going a little bit longer. maybe a few extra days. that would certainly help. with that pinger locator on site, what exactly are its capabilities? brian todd is here. he's been taking a closer look at the technology. what it means, what they're searching for. this is pretty advanced technology. >> we got access to the place that makes the towed pinger locator. this is in suburban maryland, d.c. here. it's got a lot of impressive capabilities but also some limitations. this is an extraordinary find if it is the black box for two reasons. number one, the pinger may be -- the battery life in the pinger may be dying out if it hasn't

already. number two, what we've always been told about the towed pinger locator, really, to be most effective, it needs to have a confirmed piece of wreckage already found. we haven't found that yet. the makers say it's got to have that to basically have a starting point. it never had that starting point. they just put it in the water. it was a hail mary pass. now it looks as if it may have found signals consistent with the black box. it could be a major find here wolf. that's extraordinary for the odds it was up against. >> the u.s. made towed pinger locator, what kind of track record does it have in finding these black boxes? >> it has a good one overall. in the last 18 years, it has been used four times in major air accidents in water. including the egypt air crash in 199 in the atlantic ocean. the only time the manufacturer says it failed was from the 2009 air france crash in the atlantic. it went over the black box and did not find the black box but

the manufacture says that's because the actual pinger from those black boxes became separated from the black boxes. they say the track record was excellent. if this is the black box we're talking about, it's an extraordinary find for this device. >> now that this technology's in place, searching for more signals, what can we expect next? this is the operations manager at williams and associates, also a retired navy captain, joining us from seattle. thank you very much for coming in. first, that chinese signal detected over the weekend, do you have any confidence that's the real deal? >> there could only be one black box. the navy signal seems to be a better signal than the one the chinese found and certainly it's a different location. >> there's two black boxes. you assume, as do i and everybody else, that both of those black boxes would be

relatively near each other, right? >> i would assume that. >> so let's assume -- you agree with that, right? >> right. >> let's assume the chinese -- that that's not realistic, but when the u.s. navy says they've heard beacons coming for two hours from one site and a few hundred meters away from a second site, one for two hours, one for 15 minutes, that sounds a lot more encouraging to me, i assume to you as well. >> that certainly does. >> all right. so what happens next? let's assume because the u.s. navy says -- i'll read to you a line of what they say, acquisition the two signals is encouraging but we're still only cautiously optimistic. kept pending confirmation of the black boxes by the ptl, the ping, the locator if you will, that's the towed pinger locator, that the tpl, again in visual

confirmation by the bluefin-21 sidescan sonar. walk us through what's going on now. >> right now the navy with the pinger locator wants to make one more run, and then they can correlate all that information and come up with a location. that pinger on the aircraft is good for, you know, 4 to 7 miles, so right now if that is indeed the aircraft wreck, the location is pinned down within 4 to 7 miles. >> even if the batteries dry out and stop working, you still have a relatively small area to search. >> that's right. the next step is to get that auv, the bluefin, on station and send her down. >> here's what confuses me. usually they find those black boxes, and there are two of them, after they've spotted some wreckage. as far as we know, they haven't spotted any wreckage whatsoever. so how unusual is it to find a

beacon coming from the flight data and the cockpit voice recorders without spotting any wreckage at all? >> i think somebody in the search area organization knows something that we don't know. i suspect perhaps a small seismic event when the plane hit the water might have been recorded on a very precise seismic recorder, would pinpoint a location. in addition, with the current tables they have in that area, i'm sure given the location they could say if a plane crashed here, the debris would be at this point way downstream now, and they can go search that area, maybe find some debris. >> i agree with you. i suspect the authorities are on to some information. they don't want to share publicly. because it might undermine u.s. or other country's sources and methods, how they collect this kind of sensitive information. we don't know this to be true but i suspect they may have

additional information if, in fact, they have located it, it's a huge if, if they've located these two black boxes. i want you to stay with us because we have a lot more questions. you're the expert on this subject. we're going to be coming to you. our viewers have a lot of questions as well. stand by. now, tuesday, april 8th, family members are holding a candlelight vigil to mark one month since the disappearance of flight 370.

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today, family members of flight 370 passengers are marking one month since the flight disappeared. as they listen intently to reports of pulse signals being detected in the indian ocean. says this, quote, until they physically locate the bulk of the plane with the black box

intact and passenger bodies, i won't believe it. a few bits and pieces of wreckage or pinging that isn't verified could just be planted evidence meant to distract us, families of the passen gerbs. david mckenzie joining us from beijing. families are marking this one month disappearance, and i'm sure they're all sickened or heart broken. tell us what they're doing in beijing. >> well, wolf, they're holding this vigil through the night here in asia. exactly on the time that this flight would have flown a month ago. they're going to be up all night. they've held this candlelit vigil. they've got the shape of a heart, mh 370 and a plane in candles. there are many family members sitting around there praying, not a dry eye in the room, frankly. they're just devastated at this point. not because necessarily of this latest news, but because they've gone through this month of

harrowing experience. all from when this plane originally vanished and didn't arrive here in beijing in the early morning hours a month ago. up until all the false leads, the hope that they've had over these days that we've been following this, including when they were told that the plane went down. there were ambulances in this hotel taking people off to hospital. now they're more resigned, exhausted, i have to say, try to get through day by day. in a way, it feels like the grieving process is starting tonight here in beijing. wolf. >> when they hear the u.s. navy 7th fleet out in the pacific say these words that they are cautiously optimistic that they may have found the two black boxes, the flight data, the cockpit voice recorders, what are they saying to you about that? >> well, they're saying pretty much what sarah has been saying

as well, you know, to the person that i've spoken to, wolf, the family members say that they really want concrete evidence before they believe or they know they can have some closure. they've had so many leads over this time. the satellite leads. the data analysis. and now the word that there might be this ping response from the bottom of the ocean. for people who want to know where their loved ones are, what happened to them, these are very kind of nonconcrete things. they want to grasp hold of something or see something. a bit of wreckage. and that reflects also what the searchers are saying in perth. until that point happens, i don't think these people can have any kind of closure and they've been stuck in this limbo for days and days and days, 31 days, in fact, as they hold this vigil awe through the night. in fact, tracking what exactly they know about what happened to the plane when it happened.

so when the sun rises tomorrow here in beijing, they'll still be there praying for their loved ones, and possibly no closer to knowing the truth, though there might be some hope now they could have closure. >> we'll check back with you, david, thanks very much. we'll have much more coverage of the search for flight 370 and all the new developments. that's coming up. also, another story we're following, jeb bush, the former florida governor, is he going to run for president of the united states? if he is, he's taking on right now an issue that has divided the gop. ♪ i know a thing about an ira ♪ and i got the tools ♪ to do it my way ♪ i got a lock on equities ♪ that's why i'm type e ♪ ♪ that's why i'm tyyyyype eeeee, ♪ ♪ i can do it all from my mobile phone ♪ ♪ that's why i'm tyyyyype eeeee, ♪ ♪ if i need some help i'm not alone ♪ ♪ we're all tyyyyype eeeee, ♪ ♪ we've got a place that we call home ♪

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the former florida governor jeb bush's name often comes up when republicans start talking about presidential contenders. if he does run, bush is tackling head on one of the deep issues dividing the gop, illegal immigration. speaking at an event celebrating

the 25th anniversary of as ifhi father's presidency, bush says people who to the united states illegally are often looking for way to give their families a better life. >> yes, they broke the law, but it's not a felony. it's kind of -- it's an act of love. it's an act of commitment to your family. >> our chief congressional correspondent dana bash is here with me watching this. that's pretty bold if he wants to win that republican nomination taking on an issue like this. >> it is something jeb bush believes. has been outspoken about for quite some time. parsing everything that any of these potential candidates say, especially jeb bush, who is really holding his cards close to the vest, it's fascinating. he is talking about this issue of illegal immigration in a way that no other potential republican candidate is. as a humanitarian issue, not a criminal issue. those close to him say for

obvious reasons, he lives in miami, he speaks spanish, his wife is connection can-american, he's immersed himself in these issues, and he definitely is different from so many people, most of the people in his own party. it really does show you, as you mentioned, if he does decide to run, you are going to see a very robust debate inside the republican party aboutdivisive. look what happened to the party when his brother was president and he tried to push this issue. >> a lot of republicans know they lost florida twice to president obama, florida, a key electoral college state. they have to carry florida, a few other states, ohio, for example, as well. >> on a national level, why you see so many big donors establish republicans look towards him as christie has had trouble in new jersey -- >> i want you to listen to what jeb bush said about 2016. >> sure been. >> i go about my business each

day trying to avoid having to think about it. and have a fulfilled life. and at some point, it won't be a year from now -- >> marking it down. >> end of the year, i'll make a decision. >> that sounds like somebody who is seriously thinking about running for that republican nomination. >> what i thought was rsh he said he goes through his life every day trying to avoid having to think about it. you come across somebody who does not have the fire in the belly which is making a lot of republicans say he is not going to do it at the end of the day. i talked to a source close to him who said that is just jed bush. he is is a very disciplined person and has a full professional life and that he goes through things methodically and isn't going to decide until

later. the other thing that was striking is how he went after the process. he doesn't want to get into small ball political campaign tactics. he wants to have a big policy debate. that's the kind of forum for a jeb bush. >> he will be popular in some of the early caucus states. let's take a quick look at what the markets are doing today. not so good. the dough is down about 145 points. investors are struggling after the dow dropped a full 1%. earnings later this week including alcoa, jp morgan chase and wells fargo. >> facing off in the final is

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[ female announcer ] we eased your back pain, you turned up the fun. tylenol® provides strong pain relief while being gentle on your stomach. but for everything we do, we know you do so much more. tylenol®. >> every day we get questions looking for a better explanation for the search in flight 370. we will answer your questions on the things that you are finding hard to understand like all of us. tom is joining us once again from seattle and retired u.s. navy captain. can you experts confirm whether submarine will do better at this point? do you think a submarine will help?

>> a submarine, a manned submarine would not help here. we're using an auv, which can go down do 4400 meters depth to search for the wreckage. >> you're talking about an unmanned drone. that would be a lot better than a submarine. here is a question from utah. could the surface scanner shown on chinese news be a cover for more advanced technology that they don't want others to know about? >> could be. i thought they had to have more than a sound device on a stick but apparently people are saying that is what they have. >> here is another question. does the ping area match the out of gas scenario, when the plane would have run out of gas where they are finding maybe some pings coming from the two black boxes? >> it certainly seems that way. if you take the range of the aircraft, and depending on the altitude that would have been

one of the areas to search. >> how do they triangulate the ping location? can it be done? >> it can be done but you have got to get a couple of locations. >> that's why the u.s. navy says they are cautiously optimistic of the acquisition of the two signals is optimistic but still only cautiously optimistic pending visual confirmation. >> the old shield is going to get back over and reacquire that thing from a different location and start locking it in. >> here is is a question from tammy. could boxes be separated from the plane, the voice recorder, data recorder, could they be separated from the plane? the plane be in a totally different location? >> it would not be in a totally different location. the black boxes would be in the

wreckage or near the wreckage. >> so if you find the black boxes you find the plane? >> you will find the plane, yes. >> yeah, depending on how the aircraft broke up. >> you assume it did break up, assuming it went into the indian ocean and crashed in there? >> it's like hitting concrete. >> there is no way it could have floated in smoothly? >> it's not the hudson. >> yeah. here's a question, mark, for you, could a flight crew member intent on disappearing the plane have disabled or damaged the black box to leave no record. >> no, no. >> there is no access from the cockpit or inside the cabin. >> they're in the tail of the cabin. >> they could have pulled circuit breakers which would have stopped either one of the boxes from working. >> all right. >> so we don't know. >> a lot more questions and we will continue to try to answer questions for all of our viewers.

thanks for watching. i will be back 5:00 p.m. eastern later today, another special edition of the situation room. until then, thanks very much for watching. newsroom starts right now. >> hi there. i'm in for brooke baldwin. we have huge developments. officials say major developments could happen in days if not hours. the pinger locator has detected two signals consistent with the black box. this ship, the ocean shield, first detected a series of pings that lasted approximately two hours and 20 minutes. it then lost the signal and turned back around. the towed pinger picked up another signal. but the head of the task force says until they have evidence they