thus far? >> i think the -- my impression is that we're trying to leap ahead of our actual knowledge to determine the cause of the crash. i mean, it's obvious that weather played a significant role. we'll find out once we find the flight data recorders what was going on in the airplane the cockpit recorders will tell us a lot more. and really the location relative to the last radar plot where the debris is scattered. but we don't know all that right now. we sort of have to keep our patience hat on and wait to find out what's going on or what happened. >> and don't jump to jeany conclusions. we appreciate it very much. dan, good to have you on the program. jeff as well. what happens in those busy busy flight paths when a storm hits and all the pilots want to change course? we're going to take a look at the tough calls that air traffic controllers have to make.