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

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

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

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

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

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

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 ...

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

WASHINGTON — Democratic senators representing states that bore the brunt of the fallout from explosive nuclear weapons testing are seeking to pass legislation that would bar President Donald Trump ...

In a particularly heated moment from his first term, Trump taunted North Korea’s Kim Jong Un — whose 2017 underground test is the last known example of explosive nuclear testing — for the relative ...

A U.S. official presented new allegations regarding a Chinese nuclear test from 2020 and urged global powers to enhance ...

President Donald Trump’s announcement that the U.S. would revive nuclear weapons testing — which the U.S. has not done since 1992 — left experts, lawmakers and military personnel scratching their ...