For most Americans, the events of September 11 came like a bolt from the blue on that beautiful, terrible morning. But as Strobe Talbott and Nayan Chanda observe in their well-written introduction to The Age of Terror, "the unforgivable is not necessarily incomprehensible or inexplicable." In fact, all three of these books make clear that although the attacks on New York and Washington were unexpected for many, the warning signs had long been evident -- at least to some… more