Meanwhile, nearly 400 kilograms, or 880 pounds, of uranium enriched to 60% purity is still publicly unaccounted for.

Israel and Iran on Tuesday accepted a ceasefire plan proposed by President Donald Trump to end their 12-day war that roiled ...

An early U.S. intelligence assessment indicated that the U.S. military strikes on three of Iran's nuclear facilities last ...

European governments say military force alone cannot eradicate Iran's nuclear know-how, which is why they want a negotiated ...

Far more dangerous than U-235 are the elemental products given off when nuclear fuel goes through fission—especially iodine, ...

The U.N.'s atomic watchdog and other experts say radiological contamination is likely inside a key uranium enrichment site at ...

The United States has attacked three sites in Iran, inserting itself into Israel’s war aimed at destroying the country’s ...

European nations worked Monday to keep alive diplomatic efforts to curb the Israel-Iran war as the two countries traded ...

Iran’s most heavily fortified nuclear site is at Fordo, a hilly area south of Tehran and about 15 miles away from Qum, a city ...

Israel bombed Iran’s Fordow nuclear bunker site again after the U.S.’s surprise strike on the secretive underground facility ...

Prior to the attack, Iran had threatened to retaliate against the U.S. if it became involved in its conflict with Israel.

The US dropped a barrage of massive bunker-buster bombs on three Iranian nuclear sites early Sunday in a strike Trump quickly hailed as a “bullseye.” ...