The perspectives of academics and practitioners are brought together in this insightful work, which examines the war on terrorism, the Iraq war and the roles of NATO and the EU. The book analyzes the new threats posed by terrorist strikes and the proliferation of weapons of mass destruction despite the total failure of Cold War conceptions of deterrence. It also delineates the key issues and problems that have arisen from the NATO and EU double enlargement and from the new NATO-Russian relationship. Casting light on the global and regional ramifications of the crisis, as well as the tensions in the transatlantic relationship caused by the war with Iraq, NATO and the European Union addresses the key policy questions that concern the maintenance of global peace and security.