War is never simple, but the "war on terror" is more complicated than most. Launched in response to the terrorist attacks on the United States on September 11, 2001, it includes many countries led by the United States and affects many aspects of international relations. It also takes place in many countries and regions around the world. This book examines the causes and effects of the war, from the origins of the 9/11 attacks to continuing efforts in this global conflict. Timelines show additional details, and photographs showcase the war's ongoing impact.