At the Army installation where I work, some of my fellow officers and I were at a guard post checking entry and exit vehicle traffic shortly after 9/11 during cold weather.

One lady exiting asked one of our guys, "Aren't you afraid of an attack"? The officer deadpanned a reply, " Well, the weather is cold and everybody knows terrorists don't attack during cold weather.

The lady stared at him with blank eyes for a while and agreed, saying that certainly made sense.