Philipp C. Bleek is a Nonresident Fellow with the Center for a New American Security and a PhD candidate in international relations in the Department of Government at Georgetown University. At Georgetown, his primary research interest is the causes, consequences, and amelioration of nuclear weapons proliferation. He recently taught an advanced undergraduate seminar on "Nuclear Weapons in International Politics." At CNAS and previously as a Visiting Fellow at the Center for Strategic and International Studies, he has worked for the past two years with Richard Danzig, former Secretary of the Navy, on U.S. bioterrorism policy. He is author of Global Cleanout: An Emerging Approach to the Civil Nuclear Material Threat (Harvard University, September 2004) and co-author with Richard Danzig and Rachel Kleinfeld of After an Attack: Preparing Citizens for Bioterrorism (CNAS, June 2007). He holds a bachelor of arts from Princeton's Woodrow Wilson School of Public and International Affairs and a master in public policy from Harvard's John F. Kennedy School of Government.