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

Add Yahoo as a preferred source to see more of our stories on Google. VIENNA (Reuters) -The head of the Comprehensive Nuclear-Test-Ban Treaty Organization, or CTBTO, said on ‌Thursday that any ...

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

The U.S. government revealed new intelligence on Tuesday suggesting China may have conducted an ...

President Donald Trump’s calls to ramp up nuclear weapons testing last week have put nuclear watchdogs and world leaders on alert while experts say the United States has little to gain. Photo by Yuri ...

Late last week, the U.S. leveled an explosive claim: China is planning secret nuclear weapons tests and has already conducted at least one. For the first time in decades, the U.S. and Russia have no ...

Late last week, the U.S. leveled an explosive claim: China is planning secret nuclear weapons tests and has already conducted at least one. China denied the allegations, but experts are worried that ...