that much debris if this is indeed the plane. >> the most difficult part is finding this debris on a ship in the big ocean. if the ship speeds by a pieces of debris, it can't stop, turn around and get it. that's a difficult process. how much do they need to come up with a theory of how this plane could have gone down? >> well, there's a lot of information on even just the smallest piece of debris on an accident site. for example, if there was an explosion on board, there would be evidence on nearly every interior panel. the way the plastics or interior of the aircraft would burn different whether it's a flash type of burn or sustained burn. there's a lot of good information that could be achieved, retrieved from singular pieces of metal. >> i'm thinking back on theories out there and have been out there. is there one theory we could