Obama to limit use of US nuclear weapons

President Barack Obama plans to place new restrictions on the use of US atomic weapons as part of an imminent overhaul of nuclear policy, a senior administration official said.Obama will unveil his strategy Tuesday ahead of a major nuclear conference in Washington next week and two days before Russia and the US sign a treaty promising to slash their stockpiles of long-range nuclear warheads by a third. Together with the upcoming signing of the new START treaty and nuclear security summit, the Nuclear Posture Review (NPR) advances the Presidents comprehensive agenda to increase American national security by embracing a 21st century approach to nuclear weapons, the administration official said. The NPR focuses on preventing nuclear terrorism and proliferation and reducing the role of nuclear weapons in our national security strategy, while sustaining a safe, secure and effective nuclear deterrent for the United States and our allies.