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.

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

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

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

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

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an atomic bomb, according to Edward Morse, a professor of nuclear engineering ...

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for a broader nuclear weapons agreement including both China and Russia.

The Enola Gay, the plane that dropped the atomic bomb on Hiroshima in World War II, is now a museum exhibit.

The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and Russia, ...

The Rulison test — conducted at a depth of 8,425 feet — was the deepest subterranean nuclear-bomb detonation conducted in U.S. history.

Stony Brook operated under code names such as “Site Item,” and personnel often described their unit in deliberately vague ...