A Russian official said Moscow is ready to respond with military measures if the United States deploys its missile defense ...

Without the New START treaty, which caps the number of deployed nuclear warheads at 1,550 on each side, there will be no ...

The last remaining nuclear arms pact between Russia and the United States expires Thursday, removing any caps on the two ...

Little has been made public so far, but negotiators were expected to talk about the fate of Ukrainian territory in the east ...

Trump's Greenland focus highlights urgent Arctic security needs as Sen. Sullivan reveals new U.S. defenses against ...

U.S., Russian and Ukrainian negotiators are back around a table for a second round of technical talks, but in Kyiv, Russian ...

Ukrainian President Volodymyr Zelenskyy says Russia launched a major attack on Ukraine with around 450 drones and 70 missiles ...

Envoys from Russia and Ukraine are meeting in Abu Dhabi for U.S.-brokered talks aimed at ending the nearly four-year war ...

China is paying Russia to join Arctic expeditions while also pushing for greater cooperation from Nordic states.

The treaty is set to lapse Thursday, with Russia saying it had not heard from US officials.

A nuclear treaty first signed in 2010 is expiring this week. If it's not replaced, experts say a global arms race could be in ...

U.S., Russian and Ukrainian negotiators are meeting in the United Arab Emirates, but Russia continues to pummel Ukraine and ...