Highly readable with a rich quantitative analysis of the largest ever terrorism database constructed for the period 1992-2004, the results of the study are fascinating and have important implications for current U.S. foreign policy in the Global War on Terrorism. The author has painstakingly examined, with precise numbers, the impact of the use of preemptive force in the War on Terrorism in a way that has never been done before. This is the first publication showcasing compelling data on the impact of the current war on terrorism on the level, lethality and frequency of transnational terrorist activity around the globe. With extremely current data, When Terrorism and Counterterrorism Clash is a critical reference to all in the fields of international relations and political science. This is the most compelling, provocative, and sophisticated empirical study I’ve seen of the Global War on Terrorism. It is essential reading for policymakers and scholars and couldn’t come at a more critical time. -John N. Paden, Ph.D., Clarence Robinson Professor of International Studies and Professor of Public and International Affairs, George Mason University This is exactly what we need to make informed policy decisions. - Alireza Jafarzadeh, Author of The Iran Threat: President Ahmadinejad and the Coming Nuclear Crisis and FOX News Channel Foreign Affairs Analyst A penetrating analysis with a compelling conclusion! - Daniel Druckman, Professor of Public and International Affairs, George Mason University and Visiting Scholar, Centre for Peace and Conflict Studies, University of Queensland, Brisbane, Australia