LONDON - Since 9/11, Britain has emerged as America's closest ally in the war against terrorism. Ironically, Britain is also a major base of operation for some of the most radical Islamic organizations, including some direct supporters of Osama bin Laden. But it took September 11th before the activities of these militant groups were taken seriously. In January of 2002, British military intelligence working in eastern Afghanistan made a shocking discovery in the mountains of Tora Bora. During searches of Osama bin Laden's cave complex, they found the names of 1,200 British citizens, all Muslims, who trained with the Al...