Within a few minutes of Noman Benotman's arrival at the Kandahar guest house, Osama bin Laden came to welcome him. The journey from Kabul had been hard, 17 hours in a Toyota pickup truck bumping along what passed as the main highway to southern Afghanistan. It was the summer of 2000, and Benotman, then a leader of a group trying to overthrow the Libyan dictator Muammar Qaddafi, had been invited by bin Laden to a conference of jihadists from around the Arab world, the first of its kind since Al Qaeda had moved to Afghanistan in 1996.