U.S. Secretary of State Marco Rubio warned that Iran's reluctance to discuss its intercontinental ballistic missiles was a "big, big problem."

As the Department of Defense pushes for greater AI integration, researchers said the top models chose the nuclear option in nearly all war simulations.

Iran has entered the third round of indirect nuclear talks with the US with ‘seriousness and flexibility’, foreign ministry spokesperson Esmaeil Baghaei told Press TV. Keep checking for latest updates

MOSCOW, Feb 24 (Reuters) - Russia accused Ukraine on Tuesday of trying to obtain a nuclear weapon with help from Britain and France, an allegation Kyiv called an absurd lie. A French foreign ministry spokesperson said the allegation was "blatant disinformation".

A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago.

Estonia's foreign minister has signaled the eastern NATO member was open to having nuclear weapons stationed on its soil.

Reuters, citing a senior US State Department official, has reported that the US delegation has already held talks with Russian representatives and is preparing to meet Chinese diplomats on nuclear