Chertoff: We're Preparing for Nuclear Attack

Weapons of mass destruction, small boats packed with explosives and Islamic radicalization are the greatest terrorist threats facing the country, top U.S. security officials concerns. And while the department's goal is to keep nuclear weapons from entering the country, he said it also is focusing on how it would respond should a nuclear device get through and explode — particularly how to identify and track the nuclear materials. Chertoff also said the department is putting in place new screening regulations that would require providing information on flight crews and passengers before a private aircraft departs from overseas bound for the United States. The radicalization of potential new terrorists, in the U.S. and abroad, is another growing concern, the intelligence officials said at the hearing on the nation's terrorism preparedness.