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

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

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

WASHINGTON — The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and ...

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

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

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

Oklahoma documentary "67 Bombs to Enid" shares Marshallese survivors’ stories, linking past U.S. nuclear tests to today’s ...

Jay Cowan still worries about the Rulison blast’s proximity to the Colorado River and expresses disbelief at the 107 days that radioactive gas was burned in order to test whether the radionuclides ...

New START, the last treaty between the United States and Russia that limited deployment of nuclear warheads, expired this ...