Clinton warns N. Korea against missile launch

US Secretary of State Hillary Rodham Clinton on Tuesday warned North Korea against following through on a threatened missile launch, saying it would damage its prospects for improved relations with the United States and the world. In Tokyo on her first trip abroad as America's top diplomat, Clinton also stressed U.S. commitment to Japan's security, signed a military deal to advance that and underscored the importance of the alliance by inviting Japanese Prime Minister Taro Aso to Washington next week.