Energy Policy

TEHRAN, Iran - Iran's supreme leader told a nuclear disarmament conference in Tehran on Saturday that the United States' atomic weapons are a tool of terror and intimidation.

WASHINGTON - Rewriting America's nuclear strategy, the White House on Tuesday announced a fundamental shift that calls the spread of atomic weapons to rogue states or terrorists a worse threat than the nuclear Armageddon feared during the Cold War.

WASHINGTON - President Barack Obama on Tuesday vowed to constrain the use of the nation's Cold War-era nuclear arsenal, in a bold but politically risky move aimed at discouraging the technology from spreading.