gary tuckman takes a closer look. >> this is san francisco aviation where airlines all over the worldng planes they are not using any more. we are going to demonstrate how someone would get in a wheel well. this is the door that is closed. but there is a way to sneak in a hull and we will show you. someone who wanted to get in the wheel well would get on one of the two tires. climb all the way to the top right here and this right here is where an opening would be to climb into the landing gear wheel well. once someone would climb in that hole they would end up here and i'm going to show you what happens when they climb through the hole. this is the wheel well area and we are told there is only one place to sit where you possibly could survive because when the two huge wheels move in there is no room except right here in this spot. and this is where the experts say you would have to sit with the knees close to you and this is the only place where you could possibly survive. there's nothing stupider in the world to do but this is where you can do it. >> gary tuckman reporting there. >>>

gary tuckman has that. >> on the bottom of the sea, it is dark and mysterious.eo you're looking at was taken with an underwater camera during an oil exploration under the sea. but during the discovery, more than 9,000 feet down, a vessel that sunk during world war ii, spotted on the sea floor, the ship now visible for the first time in almost 70 years. the camera picture remarkably clear. but it was not the camera that originally spotted the wreck. it was sonar. >> so you can only see eight, ten, 12 feet at a time. with the sonar type system you could actually map much larger areas. >> david miller is the president of a company that helps to map the world's oceans and seas. >> despite the fact that 70% of the world is covered by ocean, only 5% of our oceans have been explored to date. >> this is a side constant sonar device, tossed to the water off san diego. to give us a look at what is under our boat. >> all these little rescctangul spots? >> this is shallow water, what can you see in the deep, this amazing amount here, the underwater vehicles glide through th

gary tuckman, cnn los angeles. >> crews are searching thousands of square miles. at these pinger dethe teection tea. we are answering your viewer questions. if pilots are both suddenly incapacitated, can other crews still get into the cockpit? we were just talking about that. you're watching cnn's special coverage. good gummies. they're delicious, and a good source of fiber to help support regularity. wife: mmmm husband: these are good! marge: the tasty side of fiber. from phillips. bulldog: i can't wait to get to imattress discounters good and early for the tempur-pedic bonus event. i'll have first pick from the huge selection of tempur-pedic mattresses. then, i'll get to choose $300 in pillows, sheets, and other free gifts. on top of that, up to 48 months interest-free financing. it's a beautiful day for mattress discounters' tempur-pedic bonus event. mmm, some alarm clock you turned out to be. ♪ mattress discounters >> welcome back to our special coverage. searchers are race to find more clues this hour to find the missing airliner. 30 crew members are aboard t

gary tuckman, cnn, atlanta. >> president obama has condemned sterling for making incredibly racist statements michael jordan and lebron james. advertisers are distancing themselves. carmax and vision america have cut ties with team. state farm insurance have put their relationship on hold. filmmaker spike lee has a relationship with the new york knicks not the clippers. he joins us as far more than just a fan of the game. first of all, when you first heard these remarks, what went through your mind? >> i said why did it take so long? let me tell you a story. i never said this before. my right hand to god on my mother's grave. in los angeles 2011, the all-star game. me and my friend were at a restaurant and donald sterling called us over to his table, his wife rochelle was there. he started to say why are they going to go on strike, we should pay all the players $500,000. if they didn't play basketball they wouldn't have a job. i swear to god he said that. baron davis who played, he's my second cousin and has told me a whole lot of stuff about sterling. then you look at elgin baylor, the highe

gary tuckman, cnn, los angeles. >>> all right joining us, and navy fleet master diver.nt to start with you. when it comes to trying to recover the bodies of the victims here the divers not only have the challenge of navigating a ship upside down and under water but the visibility is so poor we keep hearing they almost have to operate by feel? >> yes, it is a very difficult situation to work in, anderson. particularly that they have limited time at depth that they can work. so they have got to transit from the surface of the water down and enter the ship. figure out where they are, divers can get very disoriented when they're working on a submerged ship under water. if you can imagine going forward down a hallway and taking a left, normally you would be going to the port side of the vessel, in this case you're going to the starboard. all the floating objects are now floating up to the floor above you, and all the heavy objects have fallen down to the ceiling above you. as you look for victims you really have to use your hands to identify what is in front of you. so it is

gary tuckman, cnn, los angeles. >>> all right joining us, and navy fleet master diver.start with you. when it comes to trying to recover the bodies of the victims here the divers not only have the challenge of navigating a ship upside down and under water but the visibility is so poor we keep hearing they almost have to operate by feel? >> yes, it is a very difficult situation to work in, anderson. particularly that they have limited time at depth that they can work. so they have got to transit from the surface of the water down and enter the ship. figure out where they are, divers can get very disoriented when they're working on a submerged ship under water. if you can imagine going forward down a hallway and taking a left, normally you would be going to the port side of the vessel, in this case you're going to the starboard. all the floating objects are now floating up to the floor above you, and all the heavy objects have fallen down to the ceiling above you. as you look for victims you really have to use your hands to identify what is in front of you. so it is a ver

our gary tuckman has more on what it could say about how the triple 7 went down. >> reporter: not a speckwreckage has been found from malaysian airlines flight 370. raising the question is it possible all the wreckage sank? >> the chances of not having debris? very, very remote. >> reporter: experts say the amount of debris on top of the water would vary based on the scenario of how it went down. for example, if it went down in a steep dive at high speeds. that is what happened to an alaskan airlines jet that plunged off the pacific, killing everybody on board. much of the plane sank, but not all of it. >> the wings were torn apart, there was a large debris field and the debris field was fairly scattered. and even weeks later parts and pieces and personal effects were still being combed from the ocean including by fishermen. >> reporter: what if there was a catastrophe in the plane's last few seconds where it exploded in the air before crashing? that is what happened with twa in 1996, and pan am flight 103, over lockerbie. >> in lockerbie, scotland, it was scattered over many, many miles.

gary tuckman, cnn, san diego. >>> and joining us once again is david gallow, and david soucie.hat is supposedly underneath here, will that interrupt the side scanning sonar? >> that was based on something taken a long time ago from a long way away. i don't think silt will be a problem. we always have to worry a bit about sediment kicking up. but in this case with sonar, i don't think it will be a problem. >> and in this case, a plane hitting the bottom would bring up a lot of silt, but that would settle quickly? it would happen certainly not to the level it would impact the sonar search -- >> and the environment, we talked about this a little during the break. and that's oilthr oulnly half t depth. the environment at these kind of depths under the water, it is a whole other world. >> it is a completely different world that nobody has a concept of. 50% of the ocean is above that. >> you see species down there you don't see anywhere else. >> all sorts of life forms, you don't see underwater rivers -- >> what is an underwater river. >> it is density, water moves because it is dens

gary tuckman, cnn fort pierce, florida. >> i don't know if i could do that.h a relatively small area. how confident are they that they found the right spot? also ahead, a new video shows al qaeda's top brass in a bold public meeting. how did the u.s. miss it? also a frantic search for more than 200 missing here after the ship is buried and capsizes in south korea. what went wrong? some emotional text messages. ♪ [ dog barks ] ♪ [ male announcer ] imagine the cars we drive... being able to see so clearly... to respond so intelligently and so quickly, they can help protect us from a world of unseen danger. it's the stuff of science fiction... minus the fiction. and it is mercedes-benz... today. see your authorized dealer for exceptional offers through mercedes-benz financial services. 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 imagin