The political turbulence could pose a challenge for Russian president Vladimir Putin as the full-scale war he started against ...

By Guy Faulconbridge, Dmitry Antonov and Mark Trevelyan MOSCOW (Reuters) - President Vladimir Putin's spy chief warned the ...

President Vladimir Putin has updated Russia’s nuclear doctrine, two days after his US counterpart Joe Biden granted Ukraine ...

A decree signed by the Russian leader, though long planned, came days after President Biden authorized the use of ...

Vladimir Putin has reappeared after vanishing for almost two weeks as fears of World War III grow and Moscow starts building ...

WASHINGTON − Ukraine carried out its first strike using long-range U.S.-provided missiles on Tuesday. Later, Russian ...

Sergey Lavrov branded Ukraine's use of ATACMS missiles as proof Kyiv "wanted to escalate" and vowed Moscow will "react ...

While pressure is mounting on the incoming administration, the screws are tightening on Moscow, whose war expenditures are ...

The new doctrine allows for a potential nuclear response by Moscow even to a conventional attack on Russia by any nation that ...

Putin warned in September that Russia was changing its nuclear doctrine. Biden's authorization has renewed focus on what that ...

Fox News chief national security correspondent Jennifer Griffin reports on how new NATO countries are responding to Ukraine ...