Robert Einhorn is a senior fellow with the Arms Control and Non-Proliferation Initiative and the Center for 21st Century Security and Intelligence at The Brookings Institution. He is a former US State Department special advisor for nonproliferation and arms control in the Obama administration and was assistant secretary of state for nonproliferation from 1999-2001. Einhorn also served as director for the Proliferation Prevention Program at the Center for Strategic and International Studies. His research focuses on arms control (US-Russia and multilateral), nonproliferation and regional security issues (including Iran, the greater Middle East, South Asia and Northeast Asia) and US nuclear weapons policies and programs.