Former Russian president Dmitry Medvedev has become embroiled in a tense back-and-forth on social media that prompted U.S.

Rolf Mützenich, former leader of the SPD parliamentary group in Germany's Bundestag, has criticised a "nuclear exchange" ...

The Kremlin has tried to calm tensions in a feud between Trump and Medvedev that spiraled into nuclear threats.

The USS Maine, an Ohio-class ballistic-missile submarine, transits the Puget Sound in Washington state in March. Once it ...

The Kremlin tried Monday to defuse tensions caused by remarks from one of Russia’s top officials that led President Trump to ...

President Donald Trump has set Friday as a deadline for Russia's Vladimir Putin to agree to a ceasefire with Ukraine or face ...

As Trump has said, “Words have meaning”—and threatening to deploy nuclear submarines off the coast of Russia in response to ...

Putin’s aide Yuri Ushakov said Alaska was a “logical meeting place” because the United States and Russia are close neighbors ...

“Putin uses Medvedev as a tool to express statements related to nuclear weapons, he doesn’t want to discredit his own good ...