The September 11 attacks against U.S. targets came as a frightening shock to most Americans who had never previously heard of Osama Bin Laden or the virulent radicalism associated with his al Qaeda network. In the tumultuous aftermath of the attacks, many Americans grasped for explanations as to why these events occurred and what was to be done about them. Closely-related queries were why Islamic radicals enjoy a significant amount of popular sympathy...