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It's not fractured it would not appear. you have no sign of fire people coming off in a very orderly fashion, escorted by as you can see firefighters. to your point about the investigation now, this will clearly be an investigation led by the ntsb and faa to determine what happened. this may be a really easy one to figure out. if the pilot says listen we suddenly were skidding right off the end of the runway then the other dynamics will play into this. what was your speed? were you coming in at an appropriate speed? too high? too fast? in a situation where you should have gone around? all of t...

Is hampering the search for flight 8501's flight data recorders. we know they contain valuable information. >> here are a few things you need to know about black boxes. first of all, as we said about 10,000 types they are not black, they are orange. they are located in the tail section of an airbus a-320. they store about 25 hours of information about the plane's altitude air speed, engine performance, other data. then there's the cockpit voice recorder. it has two hours of interaction with air traffic control. david, you have worked with these black boxes and you're author of a new book "mala...

Another set of altitude data coming out. making sure i had this correct this time of around. in the course of a typical crash investigation, does altitude and these kind of basic facts, it seems, does it change this much? >> no, it does not. and the reason it doesn't, in most investigations you do have a couple things that apparently are missing here. one is you have reliable air traffic control data. and at a minimum, you have the air traffic controllers voices on a air traffic control transcript or tape that's released. in the united states, that's public. that's released. you can get the ir...

Pinging, correct? >> that is correct. you can do that. it did take them, i think, two years. i don't believe they ever found the cockpit voice recorder on that particular accident. what they did find was the flight data recorder. >> okay. >> so it is going to be extremely difficult, even if you do find the location, to retrieve the boxes. >> so that brings up a really important question. what would be the different information that one would garner from each of those two different devices? >> okay. the flight data recorder records continuously data that the airplane's performance. its engine p...

Rehearsed in cyber space. >> i think law enforcement officials are looking at those pilots' homes to understand their broader relationships, their e-mails, their computer files. >> reporter: what remains unanswered is what route the plane followed as it went west. to track the path, officials are now relying heavily on a technology that was never designed to locate an aircraft. the 777 has an antenna that automatically sends bursts of data. routinely that data is by design mechanical, like how much fuel the jet is burning, engine temperature, and engine performance. but a team of clever techni...