“The greatest danger of another catastrophic attack in the United States will materialize if the world’s most dangerous terrorists acquire the world’s most dangerous weapons….Our report shows that al Qaeda has tried to acquire or make weapons of mass destruction for at least ten years. There is no doubt the United States would be a prime target. Preventing the proliferation of these weapons warrants a maximum effort—by strengthening counter proliferation efforts, expanding the Proliferation Security Initiative, and supporting the Cooperative Threat Reduction program.”
Final Report of the National Commission on Terrorist Attacks Upon the United States, July 22, 2004.