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

A U.S. official revealed new allegations regarding a Chinese nuclear test and called for international pressure on China and ...

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on ...

A US official has presented evidence of a secret Chinese nuclear test, raising tensions in global arms control discussions.

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

CHINA has been accused of a massive nuclear expansion as well as carrying out secret tests, as the United States bids to ...

US official Christopher Yeaw said 'Beijing is on track to have the fissile material necessary for more than 1,000 nuclear ...

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

Officials have ruled out earthquakes or mining as the source of a 2.75-magnitude event in 2020 near China's nuclear test site.

While China is expanding its nuclear arsenal at a dramatic pace, Russia and the U.S. are also testing new delivery platforms.

As New START Treaty expires, the US has revived claims of a secret 2020 China nuclear test at Lop Nor. Are we entering a new ...

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