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

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 ...

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

In a move that sent tremors through the global security landscape, the United States, in February 2026, publicly accused ...

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

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

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

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

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

Jay Cowan still worries about the Rulison blast’s proximity to the Colorado River and expresses disbelief at the 107 days that radioactive gas was burned in order to test whether the radionuclides ...

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