"Even during the Cold War, the leaders of the two superpowers sought to reduce the risk of nuclear war. What was possible among declared enemies is imperative in a world of increasing nuclear stockpiles in some nations, multiple nuclear military powers and growing diffusion of nuclear energy. A global effort is needed to reduce reliance on nuclear weapons, prevent their spread, and ultimately end them as a threat to the world," writes Senator Sam Nunn, distinguished professor in The Sam Nunn School of International Affairs, in an op-ed co-written with former Secretaries of State Charles Schultz and Henry Kissinger and former Secretary of Defense William Perry. Source: The Wall Street Journal, March 5, 2013