ABSTRACT
Six years after 9/11, the international community faces the prospect of a catastrophic terrorist attack far larger than the attacks in New York and Washington, DC. Many experts now suggest that it is only a matter of time before al-Qaeda or some other group uses chemical, biological, radiological or nuclear (CBRN) weapons against a Western target. Countering this threat requires a clear understanding of the technical nature of catastrophic weapons and their distribution around the world, along with a comprehensive understanding of the intentions and strategy of groups and individuals that might carry out such attacks. A comprehensive counter-terrorism strategy must restrict both the capabilities of terrorists and minimize their willingness to attack.
