"This week, CTBTO Faces features an interview with Morton H. Halperin, an American expert on foreign policy and civil liberties. Halperin served under the Lyndon Johnson, Richard Nixon and Bill Clinton administrations as an advisor on military affairs and arms control and worked with a number of think tanks and universities. Halperin was instrumental in the negotiations of several arms control treaties including the SALT and the START treaties. He is currently Senior Advisor at the New York-based Open Society Foundations (founded by George Soros). Halperin was interviewed on the margins of the ""Reykjavik"" event hosted by the CTBTO on 27 September 2012 in New York. In his interview, Halperin explains how the 1986 Reykjavik Summit marked a paradigm change for nuclear disarmament. He advocates for the strengthening of the norm against the use of nuclear weapons, leading to these weapons becoming completely obsolete for any country's perception of security or status. He also calls upon policy makers to press forward with concrete measures such as CTBT ratification, reducing the alert status of nuclear systems, warhead reduction, and negotiating a treaty cutting off the production of fissionable material."