The significant thing to me is not that this man was shot by an air marshal. He was doing his job. What gets me is, HE WAS ON THE FREAKIN JETWAY TO BOARD THE PLANE, AND CLAIMED HE HAD A BOMB??
HOW THE FREAK DO YOU GET ALL THE WAY TO THE PLANE WITH EXPLOSIVES IN YOUR CARRY ON BAG??
I mean come on, security may still suck in airports, regardless of what they do, but you cant tell me they wouldnt detect a freakin bomb?
As I said, the Marshal did his job. You have to consider every threat a real one until it's proven not to be. If there was even a hint of explosive in that bag though, security is going to get reamed.