Dr. Samore served in the U.S. government for over 20 years, focusing on nuclear arms control and preventing the spread of nuclear weapons, especially in the Middle East and Asia. In that capacity, he served both President Clinton and President Obama as the senior official in the National Security Council responsible for nonproliferation of weapons of mass destruction. Outside government, he held senior research and administrative positions at the International Institute for Strategic Studies in London, the Council on Foreign Relations and the Belfer Center for Science and International Security at Harvard University. He holds an MA and PhD from the Government Department of Harvard University.