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

Christopher Yeaw, assistant secretary of State for the Bureau of Arms Control and Nonproliferation, spoke to a U.N.-backed ...

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

US President Donald Trump has shocked the world by announcing another nuclear bomb test. There's no doubt that countries like China, North Korea, and Russia are secretly conducting nuclear tests.

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement ...

Add Yahoo as a preferred source to see more of our stories on Google. Some believe Donald Trump has been engaging in nuclear sabre-rattling intended to intimidate China - Alex Brandon/AP The United ...

Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation’s adversaries to ...

(Reuters) -U.S. President Donald Trump ordered the U.S. military on Thursday to immediately resume testing nuclear weapons after a gap of 33 years, minutes before beginning a meeting with Chinese ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

Even eighty years after the first nuclear bomb test, the consequences still haunt people all around the world. Radioactive fallout hasn’t just vanished; instead, it continues to affect the health of ...

Was President Trump’s recent directive to resume U.S. nuclear testing — after a hiatus of 33 years — an actual policy decision? Or was it a political stunt to project toughness? His surprise ...