O'Hanlon is a Senior Fellow in Foreign Policy Studies at the Brookings Institution, where he specializes in U.S. defense strategy and budgeting, military technology, homeland security, Northeast Asian security, and humanitarian intervention. He recently published Defense Strategy for the post-Saddam Era (2005), The European Way of War (co-authored, 2004), Crisis on the Korean Peninsula: How to Deal with a Nuclear North Korea (with Mike Mochizuki, 2003), Protecting the American Homeland: A Preliminary Analysis (co-authored, 2002), Defense Policy Choices for the Bush Administration (2002), Defending America: The Case for National Missile Defense (with James Lindsey, 2001), Technological Change and the Future of Warfare (2000), Winning Ugly: NATO's War to Save Kosovo (with Ivo Daalder, 2000). His policy analysis and public commentary appears regularly in many major journals, magazines, and newspapers, including Foreign Affairs, Policy Review, Survival, Financial Times, New York Times, and the Washington Post. He was previously Defense and Foreign Policy Analyst, National Security Division, Congressional Budget Office, and a Peace Corps Volunteer in the Congo. He has taught at Princeton since 2000. PhD. Princeton University.