The single omnipresent historical reference in the American media immediately in the wake of September 11, 2001, was, of course, "Pearl Harbor" – and those code words for it, "infamy" and "day of infamy," splashed in mile-high letters across the front pages of papers.

What we had experienced, it was commonly said then, was "the Pearl Harbor of the 21st century." And with that image of the Japanese attack that began the Second World War for the United States went powerful, if only half-conscious, memories of how that war ended, of nuclear holocaust, and so the place where the World Trade Center towers went down was promptly dubbed "Ground Zero," previously a term reserved for the spot where an atomic blast took place.

http://www.lewrockwell.com/engelhardt/engelhardt367.html