True, but the likelihood of somebody pulling that off again is, I'd imagine, rather small. That kind of tactic will most likely only work once. For it to happe

True, but the likelihood of somebody pulling that off again is, I'd imagine, rather small. That kind of tactic will most likely only work once. For it to happen again it would probably have to be done by people who don't blend in with the crowd going through security. For instance, an employee. Even then, chances are it would have to be a pilot or someone who can gain access to the cockpit during flight.