assessment by the u.s. intelligence agencies suggesting that someone in the cockpit deliberately flew the plane off course? for some of those answers, let's bring in aviation analyst les abend, a 777 airline captain, and also with us aviation attorney and former military pilot justin green. guys, it's great to see you. to that last point that frederik pleitgen was getting to, what can this piece provide when they analyze it? the big question is do this flaperon, did it come off in air, did it come off when it impacted the water? as a pilot though, let's take the circumstance it would come off in the air. what would happen in flight if a flaperon came off in air and what were the circumstances that it would be under? >> if it was just one flaperon, there would be a little bit of a flight control difficulty. there's other ailerons on the airplane all on the trailing edge. there's actually two on each side -- on each wing, so there would be some controllability issues, enough they would probably want to divert, but i don't see that scenario happening.