had been telling to do. >> let's remove for a second this other airport, the idea of landing at this other airport, central to the theory and talk about something else which a lot of people want to understand. could it have been mechanical. could not there have been some fire on board this plane. is there a way to wedge that into the information we know. can you create a scenario where they would for some reason input data about this waypoint and then at least 12 minutes later say "all right, good night" without telling the ground, air traffic control they had entered that data. is there any way -- any reasonable scenario? >> the only reasonable scenario i can think of, they were doing it with annin intention to dec. they didn't want the people on the ground to know what they were doing. that's the only way that makes sense to me. certainly couldn't have been an accident very severe. remember, we do know they were flying very eight more hours. and so it couldn't have been like a runaway fire. this thing does take planes down