The Ukrainian president also said a large number of people were "officially missing", meaning the total death toll is thought ...

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

The last major nuclear arms control treaty between Russia and the United States expires on Thursday, ushering in an era ...

Russia expelled a German diplomat on Thursday in response to what it said was Berlin's groundless expulsion of a Russian ...

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

BEIJING, Feb 5 (Reuters) - The Chinese foreign ministry said on Thursday that the expiration of the U.S.-Russia arms treaty ...

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

New START treaty expires, ending nuclear arms limits between U.S. and Russia for the first time in more than 50 years. No ...

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 back around a table for a second round of technical talks, but in Kyiv, Russian ...

Since the collapse of the old Soviet Union, Russia has cut a substantially diminished figure on the international stage.

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