catherine, good to see you. >> you're welcome. >> dr. alan diehl is an investigator for the safety board. nice to see you. >> good afternoon, shepard. >> i don't know what you want to make of this flight simulator angle, does it sound like a big deal to you? >> no. shepard, airline pilots know they're flying these very automated aircraft now. too pilots and the flight management systems fly the airplane. they go buy a light aircraft to hone their stick and ruddle skills. i'll see what they come up with, but right now i wouldn't get excited about him having a simulator. >> the only thing that could be in there if he was in his mind i'm going to go to this place, let's see what it looks like, then he deleted it later, that might give them a place to search. >> he certainly knows how to fly an airplane and how to land it. but i'll wait to see what the fbi says. >> after 18,000 hours in the 777, he ought to know. i want to run another thing by you that i've been reading. this comes from a respected aircraft expert. his name is ian black. he