i mean, every airline that hires a commercial pilot does do a screening. while i couldn't give you the name of it right offhand, i mean, they are performed. but they're not performed on the annual physical that a pilot has to take every year there's really never been a need before to do anything like that. megyn: i mean, this copilot, it was the first officer who subdued, or who locked the captain, who was having trouble, out of the cockpit. but it didn't happen, paul, until three hours into the flight -- rob, this is actually for you. what does that tell you about what the first officer must have been going through? >> well, i know one question i did have for the media folks at jetblue, which i haven't back from them yet was how long this crew had been flying together because normally a captain and first officer are pared together for a month -- usually a month at a time. so if this was a new pairing and perhaps this was their first or second flight, it would be a little different than if they had been flying