http://paul.kedrosky.com/archives/2008/05/03/airport_securit.html

I had always maintained that 9/11 couldn’t possibly happen again. If another group of terrorists were to take a plane now (especially without guns), i can almost guarantee that plane would not be held hostage.

Instead, the true cost of 9/11 is the fear, and worse, the cost involved in trying to stop being afraid.