A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago.

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

A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June 2020.

A U.S. official revealed details of an alleged Chinese nuclear test, urging global cooperation for disarmament while ...

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on ...

A senior US arms control official presented what he described as declassified evidence of a suspected underground nuclear ...

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an ...

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

WASHINGTON — The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and ...

So long as it doesn't ratify the Comprehensive Nuclear Test Ban Treaty, the United States won't be able to seek short-notice, on-site inspections to deter and detect possible Chinese and Russian ...

Oct. 14—In the shadow of a federal government shutdown, the site where the first atomic bomb was tested will not be open to the public this year. Located on White Sands Missile Range, the Trinity Site ...