The United States’ top nuclear arms official on Friday accused China of carrying out an undisclosed nuclear detonation in 2020, arguing that recent secretive underground tests by China and Russia have ...

Add Yahoo as a preferred source to see more of our stories on Google. People perform for North Korean leader Kim Jong Un during a celebration for nuclear scientists and engineers who contributed to a ...

ABOARD AIR FORCE ONE — President Donald Trump declined to say Friday whether he plans to resume underground nuclear detonation tests, as he had seemed to suggest in a social media post this week that ...

Last week, NPR and other news outlets aired a story about a possible nuclear test conducted in China. Assistant Secretary of State Christopher Yeaw alleged that China had conducted a clandestine ...

(CNN) — The world passed a nuclear milestone this week. And, perhaps surprisingly given the recent run of saber-rattling from the likes of Russia and the United States, it’s a positive one. “As of ...