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.

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

Satellite imagery of secretive nuclear facilities reveals Beijing’s efforts to expand its arsenal, just as the last global ...

China is on course to have more than 1,000 nuclear warheads in the next few years, according to U.S. intelligence estimates.

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

The United States accused China of carrying out secret nuclear explosive tests in breach of an international ban.

If nothing replaces the New START nuclear arms treaty, security analysts see a more dangerous environment with a higher risk ...

By Jonathan Landay WASHINGTON, Feb 17 (Reuters) - A senior U.S. official on Tuesday revealed what he said were new details of an underground nuclear test blast that China allegedly conducted in June ...

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

With the 09IIIB class and future 09V class, China’s development of nuclear-powered (and nuclear capable) submarines is at an ...