Stephen Tankel is an associate professor in the School of International Service at American University and an adjunct senior fellow at the Center for a New American Security. From 2014-2015, Dr. Tankel served as a Senior Advisor at the Department of Defense, where he led a review of U.S. defense policy in South and Central Asia, and helped to coordinate efforts to counter the flow of foreign fighters from South, Central, and Southeast Asia to Iraq and Syria. An expert on terrorism, counterterrorism, and security and military affairs in South Asia, Dr. Tankel frequently advises U.S. policymakers, practitioners, and members of the Intelligence Community on these issues. He has conducted field research in Afghanistan, Algeria, Bangladesh, India, Kenya, Lebanon, Pakistan, and the Balkans. Dr. Tankel is the author of numerous works, including With Us And Against Us: How America’s Partners Help and Hinder the War on Terror and Storming the World Stage: The Story of Lashkar-e-Taiba. He is also a senior editor of the web magazine War on the Rocks, associate editor of the Texas National Security Review, on the editorial boards of Terrorism and Political Violence and Studies in Conflict and Terrorism, and a frequent media commentator.