Sullivan made his remarks when questioned about a New York Times article last month that said some unidentified Western ...

National security adviser Jake Sullivan said Sunday that the White House is not considering returning nuclear weapons to ...

After the fall of the Soviet Union, Ukraine signed the Budapest Memorandum agreeing to cede its nuclear weapons — which were ...

Russia is closing in on a key town in Ukraine's defensive line made vulnerable by the loss of Vuhledar, the British defence ...

The United States is not considering returning to Ukraine the nuclear weapons the country previously agreed to give up under ...

The MoD took blood from troops a decade after they were exposed to radiation in Cold War weapons experiments, then misled the ...

South Korean fighter jets were scrambled as Russian and Chinese bombers entered the country's air-defense zone.

The war illustrates Russia’s deteriorating military reputation and operational failures, as well as the Ukrainian people's ...

A former UFO investigator with the U.K.'s Ministry of Defense has suggested potential links between recent drone incursions ...

The deepening alliance between Russia and North Korea is a growing threat to the U.S., Europe, and Indo-Pacific, as it ...

The current administration of US President Joe Biden rejects the possibility that Ukraine could obtain nuclear weapons. It ...