The United States has accused China of conducting a secret nuclear weapons test in 2020, raising global alarm just as a major US-Russia nuclear arms treaty expires. The claim was revealed at a global disarmament conference in Geneva,

China rubbishes claims, says US allegation an attempt to gain sole control over nuclear power after the official expiration of the arms control treaty with Russia.

US wants Beijing to join a revised nuclear weapons treaty after expiration of a previous accord between US and Russia.

President Donald Trump Thursday sowed confusion among experts with his call for the start of nuclear weapons testing, with some pundits interpreting the announcement as US preparations for a shock resumption of explosive testing after more than 30 years.

Tires stick to hot asphalt as I drive the Stuart Highway from Alice Springs northward, leaving the MacDonnell Ranges behind. My destination is the Warramunga facility, about 500 kilometers north—a remote monitoring station I've directed for the Australian National University for nearly 19 years,

India on Friday successfully test-fired nuclear weapons-capable Agni-3 ballistic missile from the Chandipur off Odisha coast, which has a strike range of more than 3,000 kilometres, officials said.

Discover the dramatic story behind the Tsar Bomba, the largest nuclear weapon ever detonated. This video explores its Cold War origins, Soviet nuclear strategy, and the events leading to its historic 1961 test over Novaya Zemlya.

Yet January 14th marked the longest period humankind has gone without one or another part of the whole exploding one of these deadly weapons, stretching back to the last North Korean test in September, 2017. All other nuclear armed states conducted their last nuclear tests between 1990 and 1998 when Pakistan ceased its nuclear testing.