Three of Britain's four nuclear deterrent submarines are reportedly out at sea at the same time in what one Navy source has ...

Russia possesses one of the world's largest nuclear arsenals, with more than 5,000 warheads compared with roughly 550 held by ...

If the U.S. pulls back from NATO, that could dramatically increase the chances Vladimir Putin launches atomic attacks to ...

The International Atomic Energy Agency said Iran is still refusing to give international inspectors access to its damaged nuclear facilities.

France has an estimated 290 nuclear warheads, most of which are launched from submarines.

For years, Tehran invoked a religious decree banning nuclear weapons even as it pursued a clandestine program to develop them. Now, following the war and the ...

The forum was hosted by Kazakhstan’s Permanent Mission to the UN in cooperation with the UN Office for Disarmament Affairs (UNODA) on Oct. 27. The event marked the 20th anniversary of the signing of ...

North Korea’s interest in nuclear weapons was decades in the making—but its first earnest attempt during the 1990s was ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A nuclear bomb map created using a simulation tool shows the ...

The first atomic bomb is detonated near Alamogordo, New Mexico, on July 16, 1945. The successful test paved the way for the ...