100, 200, 300 miles an hour. it's going to make the airplane splatter into pieces. >> reporter: isn't it surprising that we haven't seen any debris anywhere? >> i think there is debris. the ocean is huge. i don't know if all of the ocean has been looked at. i doubt it. my guess is, and it's strictly a guess, that they will find pieces of this airplane soon. >> reporter: the idea that the transponder was turned off deliberately. >> it stopped working because somebody turned it off or perhaps there was a electrical fire or some kind of problem in that airplane that depowered the transponder. we don't know what happened. >> reporter: and because we don't know what happened, he argues the pilots should be given the benefit of the doubt. the idea that their legacy is being drug through the mud is upsetting to you? >> it's very possible that they were working to do the best they could to combat a very difficult