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

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

It came as Ukraine launched its first US-supplied long-range missile strike into Russia, following authorisation by Joe Biden ...

Russian President Vladimir Putin has approved changes formally lowering the threshold at which his country can consider a ...

Nuclear powers should show more restraint, the Chinese government said on Wednesday in response to President Vladimir Putin's ...

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

U.S. President-elect Trump, who has vowed to swiftly end the conflict, is returning to the White House at a time of Russian ...

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 ...

Putin lowered the bar for a nuclear attack after the US lifted a ban on Ukraine using long-range missiles. Ukraine carried ...

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

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