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

Details of how Russia manages its nuclear weapons have remained shrouded in secrecy for decades, as has the elite military ...

The U.S. is the biggest nuclear power in Europe, but doubts about Washington’s commitment has leaders questioning their ...

North Korean leader Kim Jong-un has no intention of negotiating away his regime's nuclear and other "strategic" weapons ...

PARIS—Two weeks after Russia’s large-scale ... Britain’s top military brass last year gathered on a submarine to watch a nuclear-missile test-firing. The Trident was supposed to soar several ...

North Korea says leader Kim Jong Un observed tests of newly developed reconnaissance and attack drones this week and called ...

Russia says it has not conducted a nuclear test since 1990, the year before the Soviet Union dissolved. The last nuclear test was conducted at the Novaya Zemlya test site on 24 October ...

Russia could supply a small nuclear power plant for a mission to Mars planned by billionaire entrepreneur and SpaceX CEO Elon ...

Construction of worker camps and a new road to the site is under way in Yakutia (Russian Republic of Sakha) Rusia the small ...