An interview with John Erath, Senior Policy Director at the Center for Arms Control and Non-Proliferation, who previously served on the U.S. National Security Council, where he was responsible for European affairs. Before turning to NATO’s nuclear-sharing arrangements, under which the United States deploys tactical nuclear weapons on the territory of selected non-nuclear NATO allies, I would like to begin with a broader question. Could you outline the current U.S. nuclear strategy, with a focus