"You've written no one should be surprised when Osama bin Laden and al Qaeda detonate a weapon of mass destruction in the United States," says Kroft. "You believe that's going to happen?"
"I don't believe in inevitability. But I think it's pretty close to being inevitable," says Scheuer.
A nuclear weapon? "A nuclear weapon of some dimension, whether it's actually a nuclear weapon, or a dirty bomb, or some kind of radiological device," says Scheuer. "Yes, I think it's probably a near thing."