Russia has refused to reschedule a key meeting with U.S. nuclear negotiators that it canceled in November, a U.S. diplomat said on Tuesday, further delaying efforts to replace an expiring nuclear ...

Russia’s refusal to allow the US to inspect its nuclear arsenal could reignite pressure for the US to develop new nuclear ...

NATO called Friday on Russia to respect the only treaty it has with the United States aimed at keeping a lid on nuclear ...

The United States said Tuesday that Russia was not complying with New START, the last remaining arms control treaty between ...

Russia said on Wednesday it wanted to preserve its last remaining nuclear treaty with the United States despite what it ...

Russia's refusal to allow on-the-ground inspections to resume is endangering the New START nuclear treaty and U.S.-Russian ...

Russia wants to sit down with Pentagon officials for “open and specific” talks on alleged violations of the Intermediate-Range Nuclear Forces treaty, the Russian Defense Ministry said Saturday.

(Photo by Galerie Bilderwelt via Getty Images) One of the more likely scenarios discussed is Russia firing a so-called tactical nuclear ... the United States committing unilaterally to disarmament ...

The treaty allows five of them—the United States, the United Kingdom, Russia, China, and France—to possess nuclear weapons. But it also requires those five to pursue full nuclear disarmament.

The U.S. General said Russia will likely launch nuclear warheads if Ukraine threatens to retake Crimea Brig. Gen. Ryan said a Russian nuclear strike would cause tens of thousands of deaths Russia ...

the Russian Foreign Ministry statement on Monday said that the talks between the foreign ministers of Russia and Iran were postponed after both diplomats agreed. According to the Russian news agency, ...

A Russian hacking team known as Cold River targeted three nuclear research laboratories in the United States this past summer, according to internet records reviewed by Reuters and five ...