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 ...

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

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 ...

So long as it doesn't ratify the Comprehensive Nuclear Test Ban Treaty, the United States won't be able to seek short-notice, on-site inspections to deter and detect possible Chinese and Russian ...

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

A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June 2020.

Officials have ruled out earthquakes or mining as the source of a 2.75-magnitude event in 2020 near China's nuclear test site.

China rejected allegations from the US that it is conducting nuclear explosive tests and has undertaken an "unprecedented" ...

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

Late last week, Israel targeted three of Iran's key nuclear facilities—Natanz, Isfahan and Fordow, killing several Iranian nuclear scientists. The facilities are heavily fortified and largely ...

The administration seems to think that when it comes to nuclear weapons, more is better. With New START gone, the Navy is studying whether to reopen disabled launch tubes on Ohio-class submarines and ...