Working as a contractor for the military we used to get bomb threats all the time. Fortunately I only had to go through one of them, but before I started work there they had a large number of them.

Of course, with the large number of times it happened, people just took it as routine and a chance to break for an early lunch. Kind of sick, hunh? But nobody thought we'd ever really get bombed, even after 9/11. We just weren't a meaningful target. However, try to tell that to my wife!