On a snowy day, Friday, February 26, 1993, a massive car bomb nearly toppled the World Trade Center. The unthinkable had happened, an instantly recognizable American landmark had become the target of a terrorist attack…. There had been terrorist acts before 1993, 2 but the Trade Center attack was unique. These were not Americans killed on an airplane or in a foreign land. These were Americans killed on their own soil. And the scariest element may have been not the explosion, the scale of the destruction, nor even the number of dead but the sense of vulnerability ushered in by the arrival of guerilla tactics in America. 3