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

A senior US arms control official presented what he described as declassified evidence of a suspected underground nuclear ...

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

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

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

This area, known as Lop Nur, or Lop Lake, is often likened by defence experts to Area 51, the fabled compound where the US tests its most classified and cutting-edge aircraft. Isolated and tightly ...

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 ...

A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago. Also Monday, the assistant secretary of state ...

A U.S. official revealed details of an alleged Chinese nuclear test, urging global cooperation for disarmament while ...

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

Speaking before the Conference on Disarmament in Geneva, Russian ambassador Gennady Gatilov decried US President Donald Trump ...

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