George Perkovich is a vice president for studies at the Carnegie Endowment for International Peace and director of its non-proliferation programme. He is the author of the award-winning India's Nuclear Bomb (Berkeley, CA: University of California, 2001 edition) and lead author of Universal Compliance (Washington DC: Carnegie Endowment for International Peace, 2005). He has testified on nuclear affairs before the US Senate and House of Representatives and has participated in numerous governmental and non-governmental multinational initiatives to reduce the risk of nuclear war.
James M. Acton, a physicist by training, was a lecturer in the Department of War Studies at King's College London until August 2008. Before that he was the science and technology researcher at the Verification Research, Training and Information Centre (VERTIC). His research to date has focused on IAEA safeguards and, while at VERTIC, he participated in the UK-Norway dialogue on verifying nuclear disarmament. He has published in a number of journals and newspapers, including Survival, the Nonproliferation Review and the New York Times.