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

Beijing and Moscow build their arsenals while the U.S. restrains itself.

U.S. releases seismic data alleging a secret 2020 Chinese nuclear test at Lop Nur as global arms control agreements continue ...

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

A brand-new nuclear reactor is set to undergo testing at the Utah San Rafael Energy Lab in Orangeville, Utah. That's about ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

Foreign Ministry spokeswoman Mao Ning urged Washington to “abide by its commitments to moratorium on nuclear testing, uphold ...

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

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

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

Chinese foreign ministry spokesperson Mao Ning. The US' accusations are based on speculation and vague insinuations and are completely groundless, Chinese Foreign Ministry spokesp ...