towards some sort of take over of the airplane by a crew member or other people. we don't know yet. >> patrick, let me stay with you. is it not plausible that a pilot thinking about plans b, c, and d when you are up in the air to have back up routes. this could have been a back up route. this left hand turn, correct? >> that very well could be. they could have been preplanning for a diversion. they may have had some on board situation they were dealing with that they hospital relayed to controllers on the ground. that's not unusual. communicating problems like that is far down the hierarchy and your list of priorities. >> that doesn't jump out at me and there other wrinkles pointing in the direction of a commandeering of the character. >> aviate, navigate and communicate.