President Vladimir Putin said on Thursday that the Ukraine war was escalating towards a global conflict after the United States and Britain allowed Ukraine to hit Russia with their weapons, and warned the West that Moscow could strike back.

Putin is the primary decision-maker on the use of Russia's nuclear arsenal. The doctrine said any attack by a non-nuclear power supported by a nuclear power would be considered a joint attack, and that any attack by one member of a military bloc would be considered an attack by the entire alliance, it said.

A decree signed by the Russian leader, though long planned, came days after President Biden authorized the use of U.S.-supplied missiles by Ukraine for strikes inside Russia.

The attack with an intermediate-range ballistic missile has spurred fears of a major escalation in the ongoing war and prompted Ukraine to request new air defenses.

Russian President Vladimir Putin makes a televised address, dedicated to a military conflict in Ukraine and in particular to Russia's launch of a hypersonic intermediate-range ballistic missile attack on a military facility in response to recent Ukrainian long-range strikes with Western weapons,

Putin seems to be winning. Russian forces are pushing ahead in Ukraine. President-elect Donald J. Trump is returning to the White House. War fatigue is spreading across Europe. North Korean troops have boosted the ranks of his army.

Tensions in Ukraine spike after Russia fires a new hypersonic missile at the Ukrainian city of Dnipro. With less than two months before President-elect Donald Trump takes office, the fate of vital U.S.

At the center of an escalating arms race, Ukraine wants to join the ranks of a select group of countries that can produce ballistic missiles. This week, Kyiv struck Russia for the first time with long-range missiles supplied by the West,