Since 11 September 2001, the world is a changed place as a result of international terrorism. All countries including Australia are on heightened alert following the tragic events in New York and Bali. What exactly is “terrorism”, why are acts of terror inflicted on unsuspecting victims, and what are Australia and its allies doing to detect and prevent it? This book also takes a global perspective on the ‘War on Terror’ and assesses the progress of international counter-terrorism efforts.