A U.S. plane designed to track nuclear testing in the atmosphere flew close to Russia's nuclear bases in the northwest of the country on Tuesday, flight data showed. A U.S. Air Force WC-135R aircraft ...

Russian Deputy Foreign Minister Sergey Ryabkov warned that the country will retaliate if U.S. nuclear tests resume.

The Kremlin has urged Donald Trump to be extremely “careful” after the American president said he’d ordered two nuclear submarines to be repositioned in response to statements made by the former ...

Latvian President Edgars Rinkēvičs told Estonian broadcaster ERR that NATO must shift from 'air policing' to full 'air defence,' warning that simply escorting intruding jets is no longer sufficient.