Nine countries currently either say they have nuclear weapons or are believed to possess them. The first to have nuclear arms were the five original nuclear weapons states — the United States, Russia, China, France and the United Kingdom.

China has an estimated 600 nuclear warheads—an increase of 100 in just one year—the Stockholm International Peace Research Institute reported.

Israel has targeted the secretive Fordow facility in recent days but, according to the IAEA, so far it has either been unwilling – or unable – to damage it. Here’s what we know.

President Trump says he wants "a real end" to Iran's nuclear problem, with Tehran abandoning it "entirely," and not just a ceasefire between Iran and Israel.

Slovakia is close to a deal with Washington that would see U.S. company Westinghouse build a new nuclear reactor in the central European country, Prime Minister Robert Fico said on Tuesday.

WASHINGTON (AP) — President Donald Trump has fired a Democratic commissioner for the federal agency that oversees nuclear safety as he continues to assert more control over independent regulatory agencies.

Researchers are fine-tuning recipes for a new kind of nuclear battery at Zeno Power's office-lab complex in Seattle.

U.S. President Donald Trump said he wanted a "real end" to the nuclear problem with Iran, with Iran "giving up entirely" on nuclear weapons, in comments he made to reporters on Air Force One on his way back from the Group of Seven summit in Canada.