A top U.S. military official last week branded as "facetious" congressional concerns that the launch of a proposed long-range conventional missile might be mistaken for a nuclear salvo.
The United States has agreed to boost nuclear safety cooperation with Israel, an Israeli official said on Monday, despite the Jewish state's refusal to sign a nuclear non-proliferation treaty.
The secret site where Iran is suspected of developing long-range ballistic missiles capable of reaching targets in Europe has been uncovered by new satellite photographs.
Defense Secretary Robert M. Gates has ordered a complete inventory of the nation's nuclear arsenal and all associated components after the discovery last week that four secret nuclear missile parts had been mistakenly sent to Taiwan, an error that went unnoticed for more than 18 months.
President Bush said Thursday that Iran has declared that it wants to be a nuclear power with a weapon to "destroy people," including others in the Middle East, contradicting the judgments of a recent U.S. intelligence estimate.
The U.S. Defense Department is leaving open the possibility of developing a conventional long-range missile for deployment on submarines, despite stern congressional warnings against fielding anything that might be mistaken for a nuclear weapon during launch.
New U.S. figures suggest that the size of the Chinese nuclear arsenal appears to has increased by about one-third since 2006, according to the Federation of American Scientists. The boost is linked to China's deployment of a new generation of solid-fuel cruise missiles and ICBMs.
International databases to share information about nuclear and radioactive materials are urgently needed to help deter potential nuclear threats, according to a team of scientific and policy experts.
Companies are racing to provide radioactive fuel for America's nuclear renaissance, and are powering debate along the way. Even as the government continues to oppose Iran's efforts to enrich uranium for power plants, projects to do just that are under way in the U.S.
The United States is headed for a showdown with Russia and China this week over competing international treaties, one banning the production of nuclear materials and the other trying to prevent an arms race in space.