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

Hidden deep in the archives of the Library of Congress lies a virtually unseen film from a secret Cold War test that remains one of the most chilling relics of the nuclear age. The footage begins with ...

Late last week, the U.S. leveled an explosive claim: China is planning secret nuclear weapons tests and has already conducted at least one. The undersecretary of state for arms control and ...