It probably doesnt apply here, but I heard rumor of a Federal CC Permit several years ago. Aparrently these are VERY hard to get and held almost exclusively by Congresscritters and their buddies. The word I heard is that with one of these you can carry ANYWHERE, even on planes and such.
More likely it's been increased. We know there are more sky marshals, and we know that cops other than Federal can also carry on an aircraft. Some pilots, after having undergone a ridiculous amount of training, and becoming Federal Flight Deck officers (Heaven forbid that mere civilians could carry a weapon on an aircraft, even if they are the people flying the thing), can also carry on board. The pilots should be able to carry or have handguns on board, but I'd like to see no more training required than that for a CHL/CCW in most states. A long day's worth at most, and get rid of them being Federal Officers.