VATICAN CITY (AP) — Pope Francis changed the Catholic Church’s teaching in areas such as the death penalty and nuclear ...

What is “the Iran problem”? Trump seems to think it’s Iran’s efforts to obtain nuclear weapons, which, he has said, “they can ...

Once protected by its nuclear umbrella, America’s closest allies are now threatened by it and contemplating their own nuclear ...

Russia’s tactical nuclear weapons and hypersonic missiles pose a significant threat to Western security. With an estimated ...

U.S. officials made “very good” progress during the second round of nuclear talks with Iran in Rome and plan to meet with ...

Many scientists say “subcritical” experiments and computer simulations make nuclear weapons testing unnecessary.

Former Russian president Dmitry Medvedev said on Tuesday that more countries would get nuclear weapons in the coming years, ...

SEOUL, April 9 (Reuters) - North Korea's status as a nuclear weapons state can never be reversed, no matter how much the ...

Iran and the United States will begin having experts meet to discuss details of a possible deal over Tehran's rapidly ...

Trump has threatened to attack Iran if it does not reach a deal with the U.S. over its nuclear program, which Iran says is ...