North Korea warned this week that it might test a hydrogen bomb in the Pacific Ocean, after saying the country had already ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on June 22, 2020. China denies conducting a test.

CHINA has been accused of a massive nuclear expansion as well as carrying out secret tests, as the United States bids to ...

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

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

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

ALBUQUERQUE, N.M. — Transported in the backseat of a blacked-out Plymouth sedan was the culmination of years of feverish work — a hefty plutonium core that would soon be used to trigger the world’s ...

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

Fears of World War 3 and nuclear attacks are on the rise. But how safe would you be in DC, VA and MD during nuclear war? See vulnerable spots.

The Enola Gay, the plane that dropped the atomic bomb on Hiroshima in World War II, is now a museum exhibit.