This book focuses on the way that the transatlantic allies have sought to combat international terrorism. Since the end of the Cold War, Europe and the United States have adapted the security regime that proved so effective in ensuring peace on the continent. Transatlantic counter-terrorism cooperation has required the full range of international instruments. Wyn Rees traces the development of transatlantic security relations, focussing on key issues such as: The US-led "War on Terrorism" and whether it has resulted in convergence or divergence in US and European policies towards combating terrorism. The importance of transatlantic organizations in channelling efforts to deal with the threat. The pressure for both internal and external security cooperation in transatlantic relations. The tensions and challenges that emanate from attempting to generate cooperation between unequal state actors.