The Kremlin downplays Donald Trump's nuclear sub move, urges caution in rhetoric after his clash with Dmitry Medvedev.

Russia has declared it will no longer observe self-imposed restrictions on deploying medium- and short-range missiles, ending ...

Volodymyr Zelenskyy says his troops in northeastern Ukraine have been fighting foreign "mercenaries" from various countries, ...

President Trump has positioned nuclear submarines close to Russia. What pressure, if any, is this bringing on Russian President Vladimir Putin? NPR's Leila Fadel speaks with Sergey Radchenko, a ...