Before 9/11, most Americans found the idea that international terrorists could mount an attack on their homeland and kill thousands of innocent citizens not just unlikely but inconceivable. After more than eight years without a second attack on U.S. soil, some skeptics suggest that 9/11 was a 100-year flood. The view that terrorists are preparing even more deadly assaults seems far-fetched. Yet President Barack Obama rightly identifies nuclear terrorism as "a threat that rises above all others in urgency." As he recently said, "There is no graver danger to global security than the threat of nuclear terrorism and no more immediate task for the international community than to address that threat."
Allison, Graham. "Don't Underestimate Nuclear Terror Threat." Detroit News, October 9, 2009.