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

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 ...

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 ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

U.S. releases seismic data alleging a secret 2020 Chinese nuclear test at Lop Nur as global arms control agreements continue ...

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

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

Beijing dismisses Washington’s accusations that it conducted nuclear tests in 2020 as “groundless” and calls on the US to uphold global commitments under the Comprehensive Nuclear-Test-Ban Treaty.

State Department alleges China conducted nuclear test in 2020, reigniting debate over U.S. testing moratorium and ...

At a event in Washington D.C., A U.S. official said a remote earthquake in 2020 was caused by a Chinese nuclear test.