SHORTLY AFTER the Madrid bombings in March 2004, British security services seized a 1,000-pound cache of fertilizer used to make explosives in a raid on a self-storage facility in West London. This discovery prompted the United Kingdom's Foreign and Commonwealth Office (FCO) and Home Office jointly to undertake a detailed examination--entitled "Young Muslims and Extremism" and leaked to the London Times--of the security risks posed by the UK's 1.6 million-strong Muslim population. The study drew heavily on the assessments of MI5, the UK's domestic intelligence agency.
