GENEVA--A U.S. official focusing on arms control on Monday provided what he called new, declassified details of a Chinese ...

The United States has revealed new details about a Chinese underground nuclear test that it claims happened nearly six years ...

A nuclear escalation in the Middle East would trigger a global catastrophe. Know the physics behind nuclear weapons, and the ...

A US allegation that China conducted a secret nuclear test was widely reported despite clear evidence to the contrary, highlighting how security claims are too often treated as facts before they are ...

A US official has presented evidence of a secret Chinese nuclear test, raising tensions in global arms control discussions.

Once a nuclear war occurs, it is certain that human history will be divided into ``before the nuclear war'' and ``after the nuclear war.'' If a large-scale nuclear war occurs, a huge area will be ...

SEOUL--North Korea said on Monday a recent subcritical nuclear test by the United States adds new tension to the international nuclear arms race and vowed to take measures necessary for improving its ...

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for a broader nuclear weapons agreement including both China and Russia. The ...

Amid growing speculation of a potential US military strike on Iran tied to stalled nuclear negotiations, tensions in the ...