The United States on Thursday proposed that the 65-nation Conference on Disarmament negotiate a new treaty banning production of the nuclear material needed to make atomic bombs. Stephen G. Rademaker, acting U.S. assistant secretary of state for arms control, told the body that developments in the nuclear programs in North Korea and Iran showed it was time for a rapid agreement on the treaty to ban production of plutonium and highly enriched uranium, known as “fissile material.” Full Story