Alexei Arbatov is scholar-in-residence and co-chair of the Nuclear Nonproliferation program at the Carnegie Moscow Center. He is also and head of the Center for International Security at the Institute for International Economy and International Relationships of the Russian Academy of Sciences. Vladimir Dvorkin is principal researcher at the Center for International Security at the Institute for World Economy and International Relations of the Russian Academy of Sciences and former director of the Fourth Central Research Institute in Moscow. John D. Steinbruner is director of the Center for International and Security Studies at the University of Maryland.