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 ...

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

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

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 ...

A scheduled nuclear siren test at Portsmouth Naval Base was cancelled this morning.

Vistra Energy Corp. reports fourth-quarter and full-year 2025 results Thursday before the market opens, a pivotal moment for the power generator as investors weigh whether its high-profile nuclear ...

The Kremlin said on Wednesday that neither China nor Russia have carried out secret nuclear tests, noting Beijing had denied ...

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