September 11 marked the beginning of a new era- an age of terror in which counter-terrorism will be one of the highest priorities of national governments and international institutions. How we proceed in this new war depends in large measure on the answer to a prior question: what exactly happened here and why? In The Age of Terror, eight leading historians and policymakers address this question and examine the considerations and objectives of policy decisions in post-September 11 America. Co-published with the Yale centre for the Study of Globalization