If nothing replaces the New START nuclear arms treaty, security analysts see a more dangerous environment with a higher risk ...

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for ...

Without the New START treaty, which caps the number of deployed nuclear warheads at 1,550 on each side, there will be no ...

Successive administrations, both Democratic and Republican, went about it in the same basic way: signing deals with Russia ...

The United States accused Beijing on Friday of conducting a secret nuclear test in 2020 as it called for a new, broader arms ...

Beijing, Moscow and shaken American allies are seeking new warheads as President Trump ends more than a half century of ...

The last remaining nuclear arms pact between Russia and the United States is set to expire Thursday, removing any caps on the two largest atomic arsenals for the first time in more than a half-century ...

Hidden for decades, the Semipalatinsk Test Site in Kazakhstan was where the Soviet Union detonated 456 nuclear and hydrogen ...

Russia carried out the first flight of the Tu-160M supersonic strategic bomber built entirely from scratch since the end of the Soviet Union, in a move that marks the resumption of the country’s ...

In 1961, the Soviet Union detonated the largest nuclear weapon ever built, a test so powerful it sent shockwaves around the planet and shattered windows hundreds of miles away. This video explains why ...

The ACP100 small modular reactor demonstration project, under construction at the Changjiang site on China's island province of Hainan, successfully passed its non-nuclear turbine test run on the ...

LONDON, Jan 8 (Reuters) - Even at the height of their Cold War nuclear rivalry, the United States and the Soviet Union thrashed out a series of treaties to keep the arms race from spiralling out of ...