Russia’s Poseidon is one of the most unconventional nuclear weapons ever conceived. Powered by a nuclear reactor and designed ...

MIT researchers think they've worked out exactly how Russia's Burevestnik nuclear-powered missile flies. "It's almost ...

Tehran insists that its nuclear program is for peaceful purposes. The Trump administration is demanding assurances that Iran cannot secretly develop a weapon. By Leo Sands The next round of U.S.-Iran ...

Prime Minister Benjamin Netanyahu said on Monday that Israel's military campaign against Iran had prevented Tehran from acquiring nuclear weapons in the near term and averted an existential threat to ...

What happens to Iran’s enriched uranium stockpile, including the 970 pounds that it has highly concentrated to near-weapons ...

Iranian President Masoud Pezeshkian said Tehran is willing to guarantee it will not build a nuclear bomb but will not give up ...

In 1962, at the height of the Cold War, the United States launched a nuclear weapon high above the Earth and detonated it in ...

L’ILE LONGUE, France — French President Emmanuel Macron announced Monday that France will increase its number of nuclear warheads from the current level of below 300, but did not give a figure for the ...

North Korea has produced a nuclear warhead small enough to fit inside its missiles, the Washington Post reported Tuesday, a major development sure to further inflame tensions. The Post cited parts of ...

The US president was speaking at a G7 summit in France, with details of an agreement set to be formally signed on Friday yet to be released.

In this photo provided by the North Korean government, its leader Kim Jong Un, front right, visits a new facility to produce nuclear bomb fuels at an undisclosed place in North Korea Wednesday, June 3 ...

The report said the 12 warheads were classified as "deployed" because they were either mounted on missiles or located at bases with operational forces ...