>> all right. well, let's begin with the fact you would have been flying about 45 minutes, we're talking about the malaysian airline 370, about the time they begin to see some electronics being shut down. the acars system you mentioned. this is a communication system between the airplane and the ground, it can work in a number of ways. let's bring up the text so i can show you here this is what the screen looks like. would allow the pilot to send a text message, but at the same time, the airplane is reporting down to the ground. it would be physically located right here. this simulator doesn't have it, because for the need of simulating flight you don't have to have it. but it would be right here. to disable it, though, there is no on/off switch. that's one of those things that you would have to somehow either pull a fuse or unwire. and that would require going down one level below where we