Add Yahoo as a preferred source to see more of our stories on Google. The US and Russia's New START nuclear treaty expired this week. No further deal has been reached, opening the door to a larger ...

A viral narrative claiming that Russia has become Iran’s nuclear backstop is gaining traction online, based on the central ...

Russia’s nuclear threats have raised global fears—but how real are they? While the doctrine allows for nuclear use under ...

For the first time in decades, the world’s two largest nuclear superpowers are no longer bound by any treaty limiting their arsenals. The last remaining nuclear arms control agreement between the U.S.

Russia's ex-President Dmitry Medvedev on Feb. 24 said Russia would use tactical nuclear weapons against Ukraine, France, and the U.K. should the latter two countries provide Kyiv with nuclear weapons ...

The United States has long relied on alliances and defensive commitments to counter nuclear threats from rival states. But now Washington is reassessing how best to deter adversaries while maintaining ...

MOSCOW -- The Kremlin said Thursday it regretted the expiration of the last remaining nuclear arms pact between Russia and the United States, while U.S. President Donald Trump declared he was against ...

The agreement between the United States and Russia limiting both countries’ nuclear weapons will expire on Thursday, marking the first time in more than five decades that the two sides will not have ...

Fears of a renewed arms race are echoing around the world once again, ignited by last month’s expiration of New Start, the last treaty limiting U.S. and Russian nuclear arsenal deployment. This week, ...

Vladimir Putin and his allies have also regularly rattled the nuclear sabre at the West amid Russia’s ongoing full-scale ...

New START expired this week, prompting a new era without a nuclear arms deal between the US and Russia.Mikhail Svetlov/Getty Images The 15-year agreement restraining the US and Russia's nuclear ...