If international terrorism has a global headquarters, it is probably to be found in the barren mountains of Waziristan lining the ungovernable north-west frontier of Pakistan.
For several years after the terrorist attacks on September 11, they were engaged in little else than avoiding capture and fleeing the American-led offensive in Afghanistan.
Today, by contrast, they are probably secure enough to give strategic direction to al-Qa'eda cells across the world. Once, al-Qa'eda was best thought of as a "franchise" operation: a brand name adopted by numerous terrorist groups operating independently of the key leaders around bin Laden, who British counter-terrorism officials call "core al-Qa'eda"....