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 ...

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

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

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

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

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

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

Russia's nuclear doctrine now sees any aggression made with the help of a nuclear state as a joint attack.

Ukraine launched American-made ATACMS missiles at Russia shortly before President Vladimir Putin lowered his country’s ...

Andrii Sybiha, the Minister of Foreign Affairs of Ukraine, has said at a UN Security Council meeting that Russia's recent ...