Pocket knives aboard airplanes

This is a millimeter-sized step in the right direction. The repealing of this rule has a few people hot and bothered. I've read a number of comments in articles where people pointed out that knives and boxcutters were used to hijack airplanes on 9/11. But the practical reality is that pretty much all airline passengers and crew now know that anyone who is trying to force his way into the cockpit isn't doing so to give the pilot directions on how find LAX. Today, a terrorist who wants to fly an airplane into a building would have to kill every able-bodied non-pacifist adult on board before he can sit at the controls. That is not a feat that can be accomplished with a pocketknife.