"Yes, that's a problem because the terrorists only have to be right once, and we have to be right 100% of the time. That's an unfair fight. I do think terrorist efforts have been weakened. The organization that did 9/11 — that Al Qaeda — I don't think really exists, but it's still dangerous because it's more atomized — small groups of terrorists who one day probably will get lucky."
Fake Al Qaeda
Osama bin Laden: A dead nemesis perpetuated by the US government