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Funding for the Energy Department’s nuclear weapons programs received a boost in a bill that Congress approved March 21 to cover the remainder of fiscal year 2013.

Removing a major roadblock to Russian support for another round of nuclear arms reductions, the Department of Defense last month effectively canceled the fourth phase of its plans to deploy missile interceptors in Europe over the next decade.

With talks on renewal of a U.S.-South Korean agreement for civilian nuclear cooperation still stalled, observers are raising the possibility that the pact could lapse.

Responding to a request from the Syrian government, UN Secretary-General Ban Ki-moon is preparing to conduct an investigation into claims of chemical weapons use in Syria.

Responding to a request from the Syrian government, UN Secretary-General Ban Ki-moon is preparing to conduct an investigation into claims of chemical weapons use in Syria.

The international community cannot adequately prepare for the impact of nuclear weapons use of any scale, 127 countries concluded at a two-day conference last month in Oslo on the humanitarian and economic impacts of nuclear weapons.

U.S. nuclear weapons systems may be vulnerable to highly sophisticated cyberattacks, and the Pentagon should take steps to ensure they could survive such a threat, a Defense Department advisory group said in a recent study.