Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

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

The U.S. government revealed new intelligence on Tuesday suggesting China may have conducted an ...

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

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger ...

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

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for ...

The U.S.' top arms control official confirmed a Chinese nuclear test first suspected in 2020.

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

Energy Secretary Chris Wright on Sunday clarified that the new nuclear weapons tests ordered by President Donald Trump will not include nuclear detonations — despite Trump’s recent social media post ...

Donald Trump has trampled on another taboo, and it’s a good thing. The president said in a Truth Social post that the United States will begin “immediately” testing our “Nuclear Weapons” on “an equal ...

Iranian nuclear talks are continuing in Oman, while Russian and U.S. negotiators discuss future nuclear arms control in the United Arab Emirates, as the New START Treaty – which limited ...