radar. >> it makes more sense to you than suggesting it dipped to 4,000 feet. again, sticking on what they say, at least, though, could it have been something mechanical? there was an emergency which caused them, you know, to take the plane that low? >> okay, so let's back up on this, then. some reason it took a hard left turn and the transponder went out. that would be the most likely place that an emergency occurred. but he didn't drop there. he flew all the way across malaysia before he then dropped to 5,000 feet according to what they're saying. that doesn't make any sense to me either. if you had a problem and you knew you had a problem, when you're doing not doing enough to come off of your route from beijing, not call anybody, my radios don't work, nothing's happening, it's not working, then all of a sudden halfway down say oh, now i've got a problem. now i've got to go to 5,000 feet. it doesn't make sense. >> what about the idea that it got back up to altitude again? is this something, david, that can be programmed in? >> well, not really programmed in -- it could be programmed in. but again, you'd have to set that up as part of your flight