As events in London, New York, Madrid, Moscow, Tokyo and numerous other cities testify to, the war on terrorism has evolved into World War III. It is a 21st century war where the enemy lurks behind computers, disguises and often moles into society until the time is right to strike. It is a war where preparations are necessary but seemingly impossible to complete. This handbook comprises an important collection of articles dealing with all aspects of terrorism including September 11, foreign terrorism activities, homeland security, intelligence, international co-operation, strategy, geopolitical factors, and military responses.