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

The Kremlin said on Wednesday that neither China nor Russia have carried out secret nuclear tests, noting Beijing had denied U.S. accusations that it had done so.

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 ...

Speaking before the Conference on Disarmament in Geneva, Russian ambassador Gennady Gatilov decried US President Donald Trump's announcement last year that his country was prepared to stage its first ...

Add Yahoo as a preferred source to see more of our stories on Google. The U.S. on Friday called for a new, broader nuclear arms control treaty with China and Russia after it accused Beijing of ...

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

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

A 2018 video of a Russian missile launch drill was posted online with false captions saying it shows Iran testing ...

The U.S. on Friday called for a new, broader nuclear arms control treaty with China and Russia after it accused Beijing of conducting a secret nuclear test. “China has conducted nuclear explosive ...