A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

MOSCOW, Feb 24 (Reuters) - Russia accused Ukraine on Tuesday of trying to obtain a nuclear weapon with help from Britain and ...

President Trump is pressuring Iran to either curtail its nuclear program or face military strikes, after Iran amassed a large ...

When a mysterious crescent appeared over Moscow in 1967, alien enthusiasts were unaware they were actually tracking a 3-megaton weapon designed to bypass American radar.

The US controls nuclear weapons in five NATO countries, but Europe may choose a new path amid strained relations.

Last week, Trump gave Iran 15 days to cut a deal that would prohibit Iran from enriching uranium. Iranian Foreign Minister ...

President Putin prioritizes Russia's nuclear triad strengthening as Ukrainian President Zelenskyy warns the Russian leader ...

On 5 February, the planet entered an even more precarious era of escalating nuclear risks. The expiration of a strategic-arms ...

Tehran has denied it seeks nuclear weapons and said it was willing to accept some curbs in exchange for sanctions relief.

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

Moscow reiterates willingness to adhere to expired nuclear weapons treaty, "as long as the United States does not exceed the aforementioned limits." ...