Dr Brad Roberts is Director of the Lawrence Livermore National Laboratory’s Center for Global Security Research. Previously he served as Deputy Assistant Secretary of Defense for Nuclear and Missile Defense Policy (2009–13). In this role, he served as policy director of the Obama administration’s Nuclear Posture Review and Ballistic Missile Defense Review and had lead responsibility for their implementation. From 1995 to 2009 he was a member of the research staff at the Institute for Defense Analyses in Alexandria, Virginia and an Adjunct Professor at George Washington University. His book, The Case for U.S. Nuclear Weapons in the 21st Century, was recently recognized by the American Library Association as one of the outstanding academic titles of 2016. A member of the Council on Foreign Relations, he has a BA in International Relations from Stanford University, an MA from the London School of Economics and Political Science, and a PhD in International Relations from Erasmus University.