>> hi there, i'm brooke baldwin. breaking news on the mystery of flight 370. here we are now day 35 and the story is changing. we now have explosive new planes from a senior malaysian government official. so here is what the sources were telling cnn. that after the plane took that mysterious hair pin turn to the left, watch the red line, and here comes the left turn, it then disappeared from radar, flying about 120 nautical miles off the grid and according to data the only way it could have avoided detection like this is if it made a rapid decent in altitude. but as to whether this was a deliberate act to avoid radar detection we still don't know.

and now a month after this plane has fannish ivanished, it is c and our sources say investigators are confident that the pilot, not the co-pilot, but the pilot was the last person to speak to air traffic controllers. that was the voice heard saying good night. for weeks we were told it was the co-pilot. as for the search itself we now have a new possible signal today heard by one of these sono buoys. they are floating microphones that these search teams they toss them off airplanes into the ocean below just to listen. so if you're counting along with us, this is the fifth credible ping that could be coming from the missing black boxes, the plane's cockpit data or voice

recorders. let's talk about the altitude. the purported dip of some 30,000 feet this happened after the plane's initial course changed, after the flight crossed malaysia and flown back out over water. keep in mind the plane's next move was the jaunt around indonesia. we might be talking not one but two maneuvers to avoid radar detection. this is where we have to pause because cnn analysts have doubts that the airplane actually dropped. take a listen. >> this is suspect information because they have it on radar and then they don't. this is a boeing 777. this is not a jet continpter. it doesn't go from 35,000 feet to 5,000 feet in the blink of an eye. didn't radar pick up the ascent and decent? i think we need more information. >> more information? let's do that right now.

let's go to cnn martin savage. he is back in the flight simulator. the theory suggests that the 777 dropped as we heard mary poking some holes, but the fact that it could have gone from 35,000 feet to maybe 5,000 feet over water and then climb back up to cruising altitude, can a plane even physically do that? >> the plane can do it. mitchell, why don't you do that? we're at 10,000 feet. because to go from 35,000 feet to 4,000 feet, even if you send this plane rocketing over the top and doing a roller coaster kind of dive, which is what mitchell is doing now and you begin to hear the alarm going off, that would take this plane maybe 10, 12, 15 minutes. so, it's a long time is what i'm telling you. a big jet to go from a high

altitude down to 4,000 feet, we level off here right now. we can quiet it down and let me show you just what we actually are over the straits for the simulation. let's show you what a jumbo jet, which this is, this is why mary has these doubts flying at this altitude, flying around here. anybody who would be -- happen to be in a ship and this is one of the busiest shipping areas in the world would see a giant aircraft like this just a few thousand feet above the ground. and it's going to be very dramatic. not only visually strong but noisy. >> extremely noisy. you're going to have -- this plane flies -- >> do some maneuvers. try to think of this airplane acting as, say, a small cessna or any kind of f-18 or maneuvering over the waterway at

this very low altitude. this low altitude is is a hazardous place to fly. >> it is. it is not designed to stay at 4,000 feet for sure. >> i realize this is the new data, so why didn't a ship see it or people along the coast hear it and what was going on inside the plane? was it an emergency? was it a strugle in the cockpit? those are things we still haven't figured out. this only adds to the ongoing mystery. >> definitely adds to the mystery. thank you both very much. we want to broaden the discussion and bring two people in. let me remind you. this plane disappeared from radar. could this have indicated an emergency in the cockpit? maybe foul play? we don't know. let's talk about what we do know. our aviation analyst, mary is a former inspector general for the

department of transportation. and is now a plaf's attorney. so welcome to both of you. and before we get off of this, first help me understand. if we're talking about the plane dropping for 120 nautical miles, can you translate that for me? is that 5 minutes? is that 55 minutes? >> first of all, i hate using the term drop because it could have been a nice gradual decent. about 12 minutes. >> 12 minutes? >> maybe, or even less if it was a smoother decent. using a 3:1 ratio. so that's a gradual normal type decent.

could it have done it more rapidly? this whole premise of this radar being released to us, it doesn't make sense. if we remember the asian accident, things were progre progressivively introduced to the media. this is data that should have been released way back when. i think there could be embarrassment. >> i think this is a whole other part of the story this plane went on off and then back on radar. and at that altitude, whether it was a very calm decent or not, could it -- i mean, really is that possible to totally evade radar detect at that altitude? >> i have said before, all i know from my enroute charts is where air space begins and ends. as far as knowing as a pilot, does it really have very specific knowledge about how far radar extends? i'm always under the impression i'm under radar. to do that even at the altitude

of 4,000, 5,000 feet, you're not going to evade radar. >> if one has some sort of nefarious intention before getting on this airplane, whether they're in the cockpit or elsewhere, could one educate himself on how to avoid radar detection by flying over x place around the world at x altitude. possible? >> well, one could educate o oneself to do it. if the civilian radar had been working you would have to get that plane down to a couple hundred feet and the most obvious conclusion of this report is that it didn't happen. to do a gradual decent it would have taken 100 miles but then remember it climbed back up. >> how would you explain -- >> in the space of 125 miles. >> how would you explain a gradual decent, why would a

pilot want to do that? >> there are a couple of reasons. if you had a rapid decompression, if you lost the pressure in your plane, you would decent rapidly. if you had a problem with communications you would want to get out of the heavy air traffic areas and get down lower because if you didn't have a transponder you wouldn't have any collision ovo avoidance. there are a couple of reasons. >> i have more questions for you, viewers have questions. mary ann, please stick around. yet another signal detected in the indian ocean. might this mean crews are close to finding the wreckage, finding the keys and the black boxes as to what happened on this plane? also ahead, just 24 hours after being stabbed by one of his fellow students, a teenager, this high schooler opens up to the cameras. >> i just think that one day i

can forgive him and everyone else who got hurt can forgive him and most of all he needs to forgive himself. >> how about that from that high school student. we are learning more about the 16-year-old suspect accused of this violent rampage. more from pennsylvania next.

>> welcome back. i'm brooke baldwin and our special coverage of the mystery of flight 370. you might be wondering as you are reading about the buoys being dropped from planes way

down into the indian ocean. they can receive and send signals and today one of these buoys sent a signal back up that may have originated from flight 370s black boxes. we have signals from saturday, signals from yesterday and another possible signal today. the search could be getting warmer. so welcome. we are all learning here, new terminology talking about the locator, and that's how they detected some of the other possible pings. >> the navy has been using these for a really long time. i think they are a product of the cold war. they are a real efficient way to get a large area coverage.

you deploy a canister from a moving aircraft and it releases a little microphone when it hits the water and the microphone goes down about 1,000 feet and it has a surface float that can send the sound signals to the plane that it was launched from so we're actually getting the sonic information from below. but we're getting it in realtime to the aircraft above. >> is this method as accurate as the tpl, the towed pinger locater? >> yeah, i think so. they are all very high fidelity microphones. it's actually pretty astounding that it actually works. because if the pinger was actually on the bottom, which i think i was listening as to cnn around 14,000 feet, the sono buoys only go to about 1,000 feet down.

that means there is a long distance between the microphone listening and the actual source and the fact that they could hear it at that range is pretty astounding. yes, it's just as accurate. >> okay. that is one issue. the other is they have not found any of the debris, any of the plane wreckage floating on the surface. we saw a number of satellite images and that wasn't it. so here we are a month or so, this wreckage being in the water. if and when they find it, what will be recognizable? >> parts of it will be crushed. if it's sitting on the sea floor, it will be crushed. there will be writing on the outside. probably the paint is still in tact. with a good underwater camera system as we hope we will use and find the wreckage if we can will be able to identify the

fu fusalodge. it will be fragmented but identifiable using cameras. >> jules joffe, thank you very much. >> the families are waiting in agony for any word of what happened to this plane. some of them are still holding on to hope that their loved ones are safe. we will have that for you. and we will take you live to pennsylvania where police say this 16-year-old student went on a stabbing spree before classes even began yesterday morning injuring 21 people, most of them his fellow classmates. we want to focus on the heroes emerging including this young man. >> i could barely move because i got stabbed in the back. had to have help going to the next room and putting pressure

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>> we are learning quite a bit more today about what happened during that stabbing spree that injured nearly two dozen people at the pennsylvania high school. and we're hearing for the first time today that the school resource officer who was hurt in that attack, amazing story here. you know what he told cnn he's concerned about today? his answer was the other victims. he calls them his kids. >> do you know what it feels like to have 20 kids in the hospital? i'm concerned. they're my kids, you know?

and i just hope that you can understand that. these kids are like my own kids. i have been with them for ten years. >> one of officer yakshe's kids is brett who was stabbed in the back with not just one but two knives whose life was saved by his friend gracy evans. >> it was all kind of like a blur. i remember messing around with gracy and bumping her out of the way because i usually goof off a little in the morning and be playful. next thing i know the kid hits me in the back and that's when everything just went into straight chaos. >> miguel marquez is live in murraysville, pennsylvania. are they any closer?

i know it has been barely 24 hours later but what are investigators looking into today? >> presumably they are closer. they seized computers. at least one cell phone, reams of boxes out of the home of mr. hribal. they are going through forensics here. trying to paint that picture and understand how much thought he put into walking into the school with two eight to ten inch kitchen knives and started slashing people up and what was it that broke in him? >> do we have any more on this attacker's state of mind? i have read what his attorney said saying he doesn't suffer from any kind of mental illness. do we know any more about his state of mind? >> we do know when he was subdued finally, the one thing he kept saying to those that were around him is i just want to die, i just want to die. so something clearly set him

off. this is something his lawyer said as well that this doesn't fit the pattern of this guy. we have talked to many students who said he was a quiet guy, shy, nice, and others saying he was on the creepy side. clearly a very, very quiet guy. not much on social media. almost a nonentity. it might be difficult for investigators to paint that picture of him. >> our hearts and thoughts are with that community, miguel marqu marquez. thank you. investigators have said they have heard a new series of pings possibly coming from the plane's flight data recorder. how do they use that information to pinpoint exactly where this plane could be? big, big news today. did you hear? cbs announcing replacement for david letterman. who will take over the helm of

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>> i'm brooke baldbaldwin? did you hear that the colbert report will slowly fade away? he will ditch his mock

conservative persona for the new gig. >> obama wants equality in the workplace. that makes no place. why would i stare at a man's chest? and my facebook friend has a new book called lean in for graduates. take that parents who told them to stand up straight. >> hillary clinton announced she may run for president. i have not been this shocked since mitt romney announced he ran for president. this is the colbert report. >> how could you not laugh at this guy? colbert signed a five-year deal starting when ever letterman decides to step down next year. one week ago, letterman announced his retirement, sending shock waves through the comedy world. this is what we have from k colbert saying i never believed i would follow in his footsteps. now if you excuse me, i have to

grind a gap in my front teeth. and another possible signal being detected by a sonar buoy. this is now the fifth signal heard thus far in the past couple of days. the signal detected today was not at the same frequency but sit in the range that suggest s it is from something man-made. as they do, the families of this 239 souls on board, they are really just holding on to their faith. five weeks now into this. our senior international correspondent sat down with a mother and father whose only son was on that plane.

>> this woman and her husband are in pain, watching every newscast waiting for word on their son. >> we need to visually identify the wreckage. >> the news that we have, more pings increasing confidence from searchers they may be closing in on flight 370. >> i can't believe it. >> without proof of wreckage, it is too painful to comprehend. for weeks they have been telling themselves he is alive. >> my insides and hard are telling me still they are alive. all the passengers are alive. >> her son was aboard flight 370. an i.t. specialist, heading to beijing to begin a new job, ma y

married with two young sons. to his parents he is everything. >> he provides for us both. takes care of us, says his father. what do we do now? they do all they can do which is wait and hope. >> a woman telling us to wait. wait only. >> on television it's government officials keeping their hopes alive. >> i have always said especially to the families, miracles do happen and we are still hoping against hope because you need to hope and pray for survivors. >> on this day, that faith helping them, calling her son for the first time in days, reaching his voice mail. >> the number you have dialled is currently not available. >> a sign they believe he must

be safe. >> my son is somewhere. i got it. >> this was this morning. >> this morning. today morning. >> one day soon, though, the news on the other end of the phone may be a lot harder to bear. >> we hope, we do that he is coming back thinking i have got only one son. he has to come back. >> nick roberson, cnn, kual kuala lumpur, malaysia. >> and now we go to tom foreman who has an incredible virtual look on how the search area has narrowed. we talk a lot when you hear the possible pings and drawing the lines and zoning in on where the

black boxes may be. are they locloser? >> they are closer. they had 3 million square miles and now down to 360 square miles? there is that arc that came from the satellites. if we zoom in on that, i can show you the actual path that the ocean shield followed when it picked up the second set of pings there. you can see where all four of the pain pings are. this does help because what they have got here is the rudements of this system where they basically put a grid on to the ocean. they go back and forth back and forth one direction getting as many pings as they can. and then they go a perpendicular direction and get as many pings as they can. they are trying to get more and more. then, zeroing in on the strongest of the pings, they can put that big box down into a

smaller one and brooke, they really have to do this before they go underwater because they are going to such forbidding depths because they need better guidance to get photographs or sonic images of the wreckage. >> that's exactly right. they're getting closer and closer and then they can send the blue fin in to hopefully have that sonar in use, switch it out with a camera and find the wreckage. >> just ahead, new today if the plane -- if it did indeed skirt radar but then came back up dozens of hours later, would it have burned more, faster, or wouldn't someone had to have been at the controls for this? my experts answer that question and more. send me tweets. you are watching cnn's special coverage.

>> think about it. as an adult if you are really sick it can be really stressful. for a teenager, it can be more difficult. here is this week's human factor. >> for skylor ebersol, school took a turn for the worse. >> i would have difficulty walking or see straight. i would faint randomly. i would go to sleep some nights not sure if i would wake up in the morning. >> ebersol quickly realized

something was wrong. >> no one knew what was wrong with me. >> home from school for months at a time, away from friends and his world, and very sick he desperately needed an escape and he found it in writing. >> i just started writing. i got lost in a world and i identified with this character and it was a way to keep me going. >> then after several months, doctors finally discovered the cause of his symptoms, a rare form of lyme disease. at the same time, his thoughts turned into a book. >> the book is called the hidden world. the main character slips into a coma and turns into a wol inform the hospital room. >> i didn't intend for there to be a lot of me in the main character nate williams. >> if hidden character was published late december and

ebersol said through it all, writing saved his life. >> you have to find something that can sustain you and keep you mentally strong. for me it was writing and the quest to get published. >> cnn reporting. >> police need your help to find a driver of an suv that rear ended a car sending it smashing into a day care center. several children were hit as the car plowed into the front of the building. a 4-year-old girl dies, 14 children were hurt. the driver of the car stayed at the scene but the dodge durango kept going. the police believe the driver is this man. he allegedly ditched the durango and may be driving a rented mazda suv. coming up, we're answering your questions about altitude

changes here. how much more fuel did the jet use? does that change the search area? tweet me. also ahead, this is the reason i'm here in new york today because i along with this guy and a lot of other people are going to the rock and roll hall of fame induction ceremony. this band, kiss, being inducted tonight. and paul stanley has a new book out. we will talk about his child hood, missing right ear to the reason why he is furious with the rock hall. live interview. don't miss it. my name is jenny, and i quit smoking with chantix. before chantix, i tried to quit probably about five times. it was different than the other times i tried to quit. [ male announcer ] along with support, chantix varenicline

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>> all right, here we go, new questions on the mystery that is malaysian flight 370. stunning new revelations today. a malaysian official tells cnn that the nation's military did scramble search aircraft after it was first reported missing. flight 370 disappeared from malays malaysia's radar after 120 nautical miles that is approximately 12 minutes or so, likely dipping in altitude. could have been a controlled decent as low as 4, 5,000 feet. the u.s. transportation department. so shall we? let's get right to viewer

questions. mary, this first one is to you and this is something that has come up. if the malaysian government was giving out misleading information before, why should we believe them now? how do you answer that? >> well, we really don't have any reliability. what we want is hard evidence. if they release the satellite data, that's hard evidence. we believe that. the transmissions that they released, finally that's hard evidence and we can believe it. things released with reliability factor, something that we can see, touch, and hear? that is reliable. >> here is is a question from charles. i know you don't like the word dipped. if the plane dipped to 4,000 feet altitude and then back to cruising altitude, what happens to the shortness of the fuel burn. >> it's a good question. the whole transition makes no

sense to me. but the fuel burn would increase just for the climb alone, let alone being at 4,000 feet which makes no sense to me because if they had some sort of smoke in the cockpit situation or a depressurization they wouldn't need to go all the way to 4,000 feet. 10,000 makes it breathable for everybody. >> but whether it's 4 or 10, you are still thinking that that would have been maybe on decent to land. >> correct. >> okay. that's where you still stand. mary, this question is for you. this is from jay. how much water pressure can the black boxes with stand if they are on the ocean floor? could they be destroyed by the pressure? is that possible? >> it is possible, but black boxes are rated to 20,000 feet water depth and most importantly, so are the pingers, so we have a pretty good idea that they are with standing it and not in over 20,000 feet of

water. 20,000 is the magic number that they're rated for. >> all right. thank you two very much. we will come back to special coverage. you see this book? you recognize this guy? this new guy, face the music, life exposed? we decided, come here. look who's here. we're going to talk to him. this is the night he is inducted into the rock hall of fame. unbelievable. we have a lot to talk about. we're going to go there. paul stanley. deal? you and me, next. the day we rescued riley was a truly amazing day. he was a matted mess in a small cage. so that was our first task, was getting him to wellness. without angie's list, i don't know if we could have found all the services we needed for our riley. from contractors and doctors to dog sitters and landscapers, you can find it all on angie's list. we found riley at the shelter, and found everything he needed at angie's list.

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♪ ♪ i want to rock and roll all night and party every day ♪ ♪ i want to rock and roll all night ♪ ♪ and party every day

>> i mean, who doesn't know that song, rock out to that song. look at these guys, full make up, skin tight leather, sky high platform boots, they are the unmistakable kiss. they are hours away from being inducted into the rock and roll hall of fame. four decades of hits and 15 years of hall of fame eligibility. the rockers finally made the cut but for paul stanley, the original front man has a bitter pill to swallow here. it's called paul stanley, face the music, a life exposed. it is such an honor and a pleasure to meet you. >> thank you, thank you, thank you. >> boom. here we are. this is is a big day for you. >> okay. >> okay. it's kind of a big day. because the issue is that the hall of fame is inducting the four original band members and you have been very vocal in being livid at the rock hall and i think it was an hour or so ago

you said that this will be -- that kiss tonight will be a big nightmare for the rock hall. why? what's your beef? >> i think we're the bitter pill that they had to swallow. at some point their credibility is so in question because it's 14 years since we have been eligible. i hope that we have shown people the little man behind the levers in the wizard of oz. this is not the hall of the people. it's a small group of guys who decide who they want and who they don't and then decide what the rules are for you that don't apply to anyone else. they wanted the original four guys but we have had many members who played to millions of people. it wasn't even a subject for discussion. they told me that it was a non-starter. that's arrogance that i don't have to put up with. >> here at cnn, got to show the other side. let me read the statement, he understands your perspective but says i can't think of another band outside of gwar that has

members dressed up in costume. you basically have members that are dressing up and playing the music of the others. i know you guys are not performing. >> let me say in response this is absolute nonsense. we were not talking about current members. we're talking about members who didn't wear make up. their smoke screen may work in the press most of the time but i'm a little too articulate to take that kind of nonsense. >> will you be saying anything tonight? >> i think i couldn't irk them more than i already have. maybe it's just time to celebrate. >> as we celebrate we are also celebrating the book. >> i was born deaf on the right side. i had to deal with a lot of ridicule and taunting as a

child. i grew up in a family that not meaning to be was very unsupportive. i believed that fame would make me whole, would make me feel great. i was lucky enough to become famous and realize that fame didn't do that so the book is really about finding what makes you happy. >> you were more stanley eisen. gene similar momons comes from y of holocaust survivors. >> we were not poor, but we were far from affluent. my dad made ends meet. my mom came to america after fleeing germany, going to amsterdam and winding up in new york city and my dad was first generation from poland. >> but you grew up with survivors? >> yes. and i think that plays well into

who i am. >> how? >> because you have a choice in life. you are either a victim of circumstance, victim of the cards that you're dealt or you pull yourself up by the boot straps and make a life for yourself. you either live a miserable life and blame other people or live a beautiful life. i couldn't write this book if it didn't have a happy ending. i have a beautiful wife, children, and a great band. it's about the totality of life, not what you have to hide. >> it is the most epic band in existence. i have to ask you about gene simmons. i have read a lot of quotes. there are a lot of great bands where you have creative geniuses working together on stage but you also butt heads. do you get along? >> very much so. there is no substitute for the fact that we have been together for 44 years.

he's my brother. he is truly the brother i don't have and whatever sibling rivalry we have or back biting we do, it's all to a good end. i think our hearts are both in a good place. >> tonight, i'll be there as a big music nerd and fan taking this all in. you will be there. you have met a lot of people in your career and lifetime. is there any one particular person, any one particular band who you might actually, paul stanley, be star-struck by? >> i don't know that star-struck is the word but there are so many people that have inspired me. regardless of what i think of the rock and roll hall of fame, to be in the presence of people who shake up the world musically is inspiring to me. >> can you name one person who you want to find and shake hands? >> peter crisp, ace and gene simmons. >> congratulations.

his book is called stanley, face the music, a life exposed. first let's go there. >> we should be on the air at 6:00 as predicted. >> choose to go. go where no one has gone before. >> the skies over baghdad have been illuminated. >> where no one else will go today. you can go in search of answers only to find more questions. you might discover something unfamiliar half way around the world. or uncover something unexpected far closer to home. sometimes you might need to look back to see how you got here. and where you might be headed. and just when you think your jurny's reach journey's reachedd

you might be surprised to find that it is only just beginning and you will keep going because it's your journey, wherever it goes. >> and we continue on here on cnn. i'm brooke baldwin. naval ship is deploying. this as we get word of another possible, let me caution, possible ping coming from somewhere on the ocean floor. this time the possible flight 370 black box signal wasn't heard by the tow pinger locater, instead it was heard by one of the sono buoys. they are basically floating microphones. they get triggered once this thing hits water. if you are keeping tabs with us, which i know you are, this is

the fifth credible signal since saturday. here we are, bigger picture, one month plus into this search, an explosive revelation. sources telling us that after the plane took that mysterious left turn, it vanished from radar, flying about 120 nautical miles, roughly 12 minutes in the air on the grid. the only way it could have avoided detection like this is if it made a rapid decent in altitude to somewhere in the neighborhood of four, maybe 5,000 feet. as for the final transmission from the cockpit, the voice heard saying good night malaysian 370? we have only now been told it was the captain. and not as we have heard for weeks and weeks, the co-pilot. our experts analyzing these new developments. everything from the movements of the plane to the pilots last words. first let me take you to the

launching point of this massive search in perth, australia. tell me more about what you're learn i learning. >> this is going to be the caesar chavez that will be in the area. this is important. we actually expect they might be stopping close to us here in perth in the coming days. we will keep tabs on that. this is an indication, really, that these ships in this area are in it for the long haul. they need to stay out there. that's why they need supplies because this important work of listening and doing a visual search continues. the visual search area is smaller than ever. they are scouring looking for any sign of debris. we still don't have a cigsingle

piece of the plane. the ocean shield has detected what they think are four possible pings from black boxes and then we have a new one detected by the sonar buoy, a new ping that is emitting a frequency that has investigators thinking this is probably man-made. if they call a press conference in the morning hours here, it will be the evening hours on the east coast, you can bet they will announce something about whether this turns out to be another confirmed black box ping, they believe, or not connected at all. so we're definitely hoping to find out soon. >> thank you very much. let's talk to more. gentlemen, hello. let's first begin with, i feel like we have to be careful when

we describe this drop versus decent. do we know for a fact whether it went from 30, 35,000 feet to quickly dropping or was it gradual? was there intent? >> i think we have got to be cautious. we know that the aircraft disappeared off of radar. we know that primary radar goes out 125 to 150 miles. what we have got to be cautious about is aligning altitude that has been put out there with the fact that it disappeared off the radar. we don't know that it was four or five. there has been an assumption made but a 777 is a big jet, it has a huge radar cross section. radar is affected by humidity, precipitation in the air, weather, it's very hard to align an altitude to a range to weather to when it might disappear. >> you looked like you were shaking your head. >> the difficulty is the

interpretation of the facts. because what the malaysians have said is that it lost radar contact. the range is fairly limited, it is certainly more limited than people understand. there is an entire series of events around that time from the moment it does the turn to the moment it starts the long haul down into the south indian ocean where the detail is sketchy. nothing has been released by the malaysians and that, i think is what we have to look at next. >> michael didn't i heard you say in another lifetime it was your job to avoid radar

detection? >> yeah, i was a weapons instructor, i ran the weapons school for helicopters in the uk and it was our job to understand radar, the way it works, the way it tracks you. the pulse repetition frequencies, the amplitudes of the signals, listening to the radar warning receiver. and we flew, for fast jets it was 250 feet, for helicopters, that is 50 feet. that is pretty low. and you had to be at that altitude to make sure that a radar didn't see you. >> this is is a 777. this is why this 4,000 feet, it raises a very strong eyebrow because 4,000 feet is -- as i understand everything you have said, 4,000 feet puts you on radar. >> it depends on what the range is. >> but if radar is available, 4,000 feet will pick it up. >> if you're at 500 miles you

might be all right. 100 miles? absolutely you will be on the radar. if there is is a weather storm passing through, it will reduce sensitivity. on a clear day you can see further. we're overlapping the what and the why. we need to ascertain what happened. it goes back to the where what why. when we get the black boxes we will understand what happened. why it happened is still a huge investigation. >> i like that you say when. sounds like angus houston is confident in australia. what are we? five weeks since this thing took off. still no debris. how do you answer that question? if they are in the neighborhood, it's a massive search area, i know, why have they found nothing? >> two reasons, a, dispersal. if that is the case, there is debris waiting to be found. now that they are forward targeting where the debris would have gone and angus houston has

said it's much more targeted. if you notice where the planes are going it's a much more refined area within a certain zone. that's the first reason. and the second reason is slightly more adventturous, and that is that the plane is substantially in tact. >> i have heard myriad opinions on that from people saying absolutely it's a possibility to others saying the miracle on the hudson, that was an anomaly and no way could it happen on the indian ocean. >> i said substantially in tact. >> we still don't know. we have had mitch in the simulator doing a fantastic job. it only became apparent that the aircraft may have ran out of fuel. mitch made a very good point. if a pilot were in that situation he would attempt a sea landing with power before he ran out of fuel. and i thought that was a wonderful point that was teased out after about four weeks.

if the pilot got it wrong he would have a bit of fuel in the tanks to be able to go around and retry it again. we're talking about a highly unlikely scenario, but never the less we don't have enough evidence to rule it out or confirm it so we're stuck in the middle ground. >> we are stuck until they find -- michael's right. it's the what, the when, and the why. the why, i safely suggest, can be left to another day even though it's fascinating. but it's the what. >> has it ever been done that it's possible they find the black boxes before they found surface debris. >> never. >> never? >> they have never by passed the hay stack and zoned straight in on the needle. as far as i'm aware, what is going on is unprecedented. and if it does end up in this area and in angus houston's

optimism is krcorrect, this wil rewrite the way the searches are conducted. >> thank you very much. coming up more on the missing plane. more on this new signal. may it be a ping? we don't know. can the location finally lead us to those black boxes? we will talk to an expert on that, plus this. >> next thing i know, the kid runs and hits me in the back and that's when everything just went into straight chaos. >> incredible story here of this young man, this teenager who was stabbed yesterday morning. describes what happened to him. he describes the moments before the attacks in the hallways, in the classrooms. also more on this teen aged suspect next. you're watching cnn. transferred money from his before larry instantly bank of america savings account to his merrill edge retirement account. before he opened his first hot chocolate stand

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>> welcome back. i'm brooke baldwin. welcome back to our special coverage of the mystery that is flight 370. you may wonder why these crews are tossing buoys deep down into the water around the search area? these buoys can send and receive signals as well and today one of these buoys is said to have relaid something that might have come from flight 370. maybe, maybe a ping from one of the black boxes. now we have signals from saturday, signals from yesterday and another signal today so the search could be getting warmer. fred hague joins me live from boston. he has helped design ping detectors and black boxes. he is vice president of

engineering. fred, welcome. >> hi, brooke, how you doing? thanks for having me. >> thank you for coming on. let's begin with the sonar buoys. how do they work? >> well, the sonar buoys have been used for submarine reconnaissance for quite a number of years. what they do, the main idea behind them is you drop them down behind an aircraft. they have a long, say 1,000 foot cable with a hydro phone on the end of it. the idea behind that is near the surface of the water you have all of these thermal layers and those layers are going to really make havoc with your acoustic signals. they will bend the sound much like a prism will bend light. you want to get below them so you get clear direct signals from the source that you want to

listen to. >> that's the thing about the water. i found myself reading a lot lately about sound and the sound waves through air travel more or less in a straight line but as you pointed out you used the word bend. that's what makes, you know, tracking these pings particularly tricky with the sono buoys is that more accurate than say a towed pinger locater or is that all the same? >> well, the towed pinger locater is going to be much deeper and closer to the seabed but one potential advantage of the sonar buoys is maybe you have two or three of them and if they all somehow manage to detect the same ping, it's possible to get some level of triangulation, maybe, using the sonar buoys. and they're passive -- it's not like having another ship operating in the area. they can do it and they can do

it very quietly so as not to disturb the work that is going on with the towed pinger locator. >> fred, this is maybe a silly question. why not just throw the resources at this now narrowed search area? >> i just don't know how many they have available but they are pretty readily available. and if they decide to choose where to use them, they want to use them in an area where the ship's not likely to be operating because they want the environment to be as quiet as possible. so they don't want to overlap their work efforts. they want to use them together to coordinate the efforts. >> makes sense. thank you so much live in boston for me. and stay with me. we have much more on this missing plane. coming up this hour, sources telling cnn the plane went down to approximately 5,000 feet when it disappeared from military radar. we will take you back inside the

flight simulator and show you exactly how a pilot, if a pilot could pull that off. the other big story we are watching today, we are hearing from a victim and hero impacted by that stabbing rampage at a pennsylvania school. the school resource officer credited with helping subdue the suspect talks pubically for the very first time and one of the teenagers recovering in the hospital holds a pretty emotional news conference. do not miss these stories neck on cnn. [ children yelling ]

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>> the shy kid in the corner from a family like the brady bunch. those are descriptions of the 16-year-old accused of a stabbing spree that injured nearly two dozen people before classes even started in murr murrysvil murrysville, pennsylvania. he is being treated legally as an adult in the state of pennsylvania and a single count of possessing a weapon at school. the only adult injured in this attack is this man, school security guard, william "buzz" yakshe and you can hear the worry in his voice when he talks about what he calls his kids. >> have you ever had 20 kids in the hospital?

they're my kids and i just hope you can understand that. these kids are like my own kids. i have been with them for ten years. >> senior medical correspondent is outside franklin regional high school for us in murrysville, pennsylvania. and elizabeth, buzz yakshe's kids did some pretty incredible things under horrendous conditions. can you give us an update on how the victims are doing? >> originally there were about 24 patients sent to the hospital. ten remain, four of whom are in critical condition. some of them are on ventilators and will need more surgery. in the midst of all the saddens there is really incredible stories about teenagers with no training retaining come p inini. nate had the where with all to

pull the fire alarm. and he also had the where with all after he was stabbed to take a selfie in the hospital gown. i guess that's what teenagers do. and also brett was in school with his friend, gracy evans. he pushed her out of the way of the assailant and then she took care of him. let's listen to what brett had to say. >> what was going through my mind? will i survive, or will i die? >> your friend saved your life. >> yeah. gracy saved my life. >> now gracy wrote on her facebook page, breath, you saved me. you took a knife for me to protect me. i'm forever grateful for that. i knew i could not leave your

side. i know we will get through this together. we were hurt in different ways, but we will survive. you saved my life so i saved yours. >> it is horrible that we have to talk about situations like this at a high school. brett's mother was asked about allex hribal. watch this. >> i don't want to see any child that is honestly able to do something like that, i feel that it is not only his peers, his family, but it is the school who needs to look and say what have we done to alienate this child for him to do such a gruesome thing. and i hope that his family can find peace and i hope this child can find peace. >> i mean how about that

elizabeth? hearing those words from that mother, what more do we know about this 16-year-old allex hribal? >> you know what, brooke, there is so much that we don't know. we know that his lawyer says that he had friends. says that he was not a loanener. but other students say he was quiet and didn't have a lot of friends. they didn't say he was bullied or alienated. but the question issued by brett's mother, is it possible to identify kids who might be on the edge of social life and identify before things go wrong. >> our heart is with that community. thank you so much in murrysville, pennsylvania. we are learning so much more about the missing plane today. one of the biggest clues, a

source telling cnn the plane went down to about 5,000 feet when it disappeared from military radar. we will take you inside the flight simulator to show you exactly how that can be done and tell you why a pilot would want to do that in the first place. that's next. there is no substitute for experience. for what reality teaches you... firsthand. in the face of danger, and under the most demanding circumstances. experience builds character. experience builds confidence. and experience... has built this. the 2014 glk. the engineering, and the experience, of mercedes-benz. see your authorized dealer for exceptional offers through mercedes-benz financial services.

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>> bottom of the hour. i'm brooke baldwin and new information coming in from the ranks that changes the information that we knew about today's path. after that plane took that mysterious left turn and disappeared from the radar flying about 120 nautical miles off the grid. translation? about 12 minutes flying time. the only way it could have avoided detection like this is if it made a rapid decent in

altitude to somewhere between 4,000 and 5,000 feet. as to whether or not this was a deliberate act to avoid radar detection, we still do not have that information. cnn is being told, malaysia's government has just denied this claim on twitter. let's talk about the plane's purported dip. they say it happened after that initial course change that the plane was lost to radar for those 120 nautical miles and keep in mind the plane's next move was to jaunt around indonesia so we might be talking about not just one but two maneuvers to avoid detection of radar. that said we are hearing a lot of skepticism about the purported decent.

mitch, can you just walk me through possible scenarios here when we talk about the change in altitu altitude? how would that work? >> sure, sure we can. i mean, keep in mind there has been a number of different reports that have come out over the weeks and the latest one is how it got down to 5,000 or 4,000 feet. this is as if you were looking at it from just outside the aircraft. this is the best way to show you angles and attack dives and moegs of the aircraft. if i said we had to get down from cruise to 4,000 feet and we had lots of time, show us what that kind of decent would feel like? what would that rate be roughly? >> roughly about 22, 2,000 to 2200 feet per minute.

>> that would be the typical kind of decent if you're going in to land at an airport. if you hear we are going to descend into atlanta. it's slightly nose angled down. this is is a gentle normal decent. that is example one. say it wasn't that. say it was the horrible terrible got to get it right down on the deck as fast as we possibly can, decent. mitche mitchell, give us that kind of decent. >> so i have taken off auto pilot. >> if you're trying to go from 35,000 to 4,000 feet that will still take 12, 14 minutes. notice now. this is a dive. you're pushing the aircraft beyond what is safe to operate. you can see it is nose down. you can see that the air brakes are deployed. the alarms are going off in the background warning you you could be doing damage to the aircraft and this is now dekrending where

the numbers are spinning so fast you can't get a real idea of how quickly you're going down. that's the emergency dive to get down to 4,000 feet, probably beyond an emergency dive. >> absolutely. >> those are the two ways to get there. here's the other thing to point out. once you're at 4,000 feet, this is a jumbo jet now roaring down a heavily traveled waterway. how come nobody heard this thing? how come nobody looked up and said wow, that plane is really big and really low and apparently nobody did. so to think of a plane like this flying that low, it is not a comfortable feeling. >> all good questions, gentlemen. thank you so much for explaining the two possible scenarios. we just don't know the answers yet. thank you. coming up next we have pretty amazing video from underwater. this is the latest technology

searchers are using to try to listen so closely to possible pings from those two black boxes. this device, it's called the sonar buoy. we will explain how this works and how it's helping next. huh, fifteen minutes could save you fifteen percent or more on car insurance. everybody knows that. well, did you know pinocchio was a bad motivational speaker? i look around this room and i see nothing but untapped potential. you have potential. you have...oh boy. geico. fifteen minutes could save you fifteen percent or more on car insurance.

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>> welcome back. searchers hunting for flight 370 detected a possible new signal underwater, raising hope that they may be raising hope on the so-called black boxes. this could explain what could cause the plane just to vanish. let me explain what this thing is. the signal was detected by the sono buoys that have been deployed by this australian plane. how do they work? chad myers has an answer or two. we have talked about towed

pinger locators. sono buoys. what is it? >> world one one, world war ii technology to find submarines. they throw these listening devices. there are active sono buoys, but these are passive. they are just listening. they get thrown out of an airplane, they land in the water. an umbilical cord about 1,000 feet long. it goes all the way to 1,000 feet below the surface and a balloon pops up. it is a bobber and its antenna. so think of this 1,000 foot long piece, if this microphone hears something, it sends that signal back to the aircraft and you can hear it for almost eight hours this thing will work down below the surface. here is what we know about this buoy. it came out of the australian

plane. it landed in the water down here listening for pings, only listening, not pinging itself. these are only the passive, only the listeners back up at the top is the antenna and it sends it back up to where the airplane is. this is marine traffic.com. we have heard all about these ships out there. we can finally show you one. here is is a live picture of what ocean shield has done over the past 12 hours. it is here going back and forth over this. i have measured this square, about 47 square miles. the hms echo is in the area, it's over here still kind of staying out of the way. this is the only ship they want in this area so there are not pings and clicks and other sounds coming out of other planes and fish finders. good news now that they did find

something. a big checker board trying to find more of the pings. >> hopefully they have lots of them through the resources, and coming up next. plus the story that a lot of you are talking about and tweeting about. huge announcement that it will be steven colbert. will he stay in character? does the timing of the announcement mean anything? where are the ladies late at night. we will talk about that next.

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apparently colbert will ditch his mock conservative persona for the new late night gig. >> tonight, did the cia go too far to fight terrorism? if you answered yes, the drones are on the way. standardized tests get an update. reading comprehension will now be limited to 140 characters. and my guest has a new book "seeds of hope, wisdom and wonder from the world of plants." joke's on her. it's printed on dead plants. >> here's the deal. colbert signed a five-year contract to host the show starting when ever letterman decides to step down next year. he has been doing the "late show" with david letterman since the early 90s. before that he did "late night" on nbc. this is awesome in your world, to cover this kind of me

mega announcement but i keep thinking who is steven colbert without steven colbert. >> i think we're all about to find out. it's going to be quite an invention. he does interviews out of character. >> rarely. >> i have a hard time describing him out of character. even if you have seen him once or twice be his normal self. he will have to reintroduce himself. >> clearly he was pretty egger if it only took a week between the time that letterman announced his retirement and the time that they announced the

person who will go after him. it really is generational change. we're talking about a 49-year-old going into the job competing against jimmy kimmel and jimmy fallon. we know what the late night wars will be like. >> where are the ladies? tina fey? >> that's what we were saying. isn't it time to have a woman host a big late night show. >> what are the networks afraid of. >> it's not that so much as if there is is a woman out there that would bring in the audience that steven colbert would. if you bring in tina fey or amy poehler or even chelsea handler, but colbert may be a safer choice. i think we will see many more programs in late night. chelsea handler is not going to be the only one. there is an audience for more shows hosted by women in late

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watch morgan spurlock, this sunday at 10:00 p.m. eastern on cnn. coming up next, you have asked, we have answers. we answer as best we can. alex asks, decompression was my first thought when they plunge to below $5,000. where are the maintenance records? good question. let's find out the answer right here on cnn.

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not a single shred of debris found 35 days now after malaysia flight 370 disappeared and so everyone is wondering how this plane possibly hit the water somewhere in the southern indian ocean. might it have been a speed dive? could it have been an intentional slower dissent, a midair explosion? could the plane have landed in tact? we're getting some answers here with michael kaye, retired lieutenant colonel in the military. can you walk me through because we're reporting that this plane at some point after the left-hand turn descended to 4 or 5,000 feet. what are different ways in which it could have descended? >> well, as i said before, the

where, the what, and the why. i just want to be a little cautious about jumping to the why. but for the purpose of exploring a few hype poothesis. there are three reasons. the first would be compression, for the passengers. aircrafts normally fly around 35,000 feet. if you get a bang or explosion, anything that hurts the integrity of the hull, we go through and train and we're put into a chamber and we're put in 8,000 feet and the chamber is put in 35,000 feet. it's very, very painful. you want to get the aircraft down because it's painful and then because of hypoxia. it could be going under an

airway. that is in a more nefarious type of situation. >> what does that mean, airway? >> it's like a road in the sky. that's what airlines fly. they fly at different levels, different flight levels. so flight 100 would be 10,000 feet. >> okay. it's like a square box in the sky and you have a base and if you want to cross under the airway and you're not speaking to any agency's radar, you have to go under the airway so you have to descend. and then the third one is just a mechanical problem of some sort that would require you getting below 10,000 feet in order to get oxygen and, again, that would sulggest that there was something wrong with the integrity of the airplane. >> okay. >> those are the three hi hypothesis. >> three scenarios there. let me jump to one question from michael. michael's question -- forgive me.

alex asked this. decompression was my first thought with plunge in altitude to below 5,000. where are the plane's maintenance records? >> that's a good question. i think the plane's maintenance records will be held with within malaysia airlines in kuala lumpur. >> and do the alternate routes have anything to do with the search where flight 370 is ongoing? >> i don't think so. the senior captain was a training captain, it was his job to bring on relatively junior co-pilots on to the fleet and train them. he was hugely passionate about flying. having a simulator in his home wasn't anything new for me. i have a lot of friends that don't have simulators in their apartments but i don't think it's odds. the guy was just really

passionate about flying. he's going to have various diversions and what not in the computer to practice. the reason they could have been wiped, a macro or home pc only has a certain amount of storage space. >> and nothing suspicious. nothing from them thus far. michael kaye, thank you so much. i'm brooke baldwin. thank you for watching. "the lead" with jake tapper is next. but before i let you go, let's go there. >> we should be on the air at 6:00 as predicted. >> choose to go, go where no one has gone before. >> the skies over baghdad have been illuminated. >> where no one else will go today. you can go in search of answers. only to find more questions. you might discover something unfamiliar. halfway around the world. or uncover something unexpected far closer to home.

sometimes you might need to look back to see how you got here. and where you might be headed. and just when you think your journey has reached an end, you'll be surprised to find it's only just beginning. but you'll keep going. because it's your journey wherever it goes. just when you thought you couldn't have any less confidence in malaysian government officials, a potential bombshell. i'm jake tapper. this is the "the lead." the world lead. the malaysian government officials are now denying it but sources tell cnn that the malaysian air force was on the right track nearly hours after the plane disappeared. so why did they supposedly wait three days to tell anybody about it? as the intense international search went on hundreds of miles away in