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 ...

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

This marks the first time that the U.S. has accused Russia of violating the treaty, which entered into force in 2011.

Russia's refusal to allow on-the-ground inspections to resume is endangering the New START nuclear treaty and U.S.-Russian arms control overall, the Biden administration charged on Tuesday.

"Russia's refusal to facilitate inspection activities prevents the United States from exercising important rights under the ...

(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.

It follows months of more hopeful US assessments that the two countries would be able to salvage cooperation on limiting strategic nuclear weapons despite high tensions over Russia's war on Ukraine.

U.S. reliance on Russian nuclear fuel is substantial, but American companies have some options if Rosatom is hit with sanctions. How did the United States and Russia get entwined in the civilian ...

North Korea’s spike in missile testing and development of its nuclear program has prompted South Korea to re-evaluate its defense capabilities, including the potential development of a nuclear ...

Announcement by Moscow agency comes at a time of fraught ties between countries since start of Ukraine war Russia’s FSB security service said on Thursday it has opened a criminal case against a ...

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, ...