A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

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 ...

US intelligence agencies believe China is developing a “new generation” of nuclear weapons — with Beijing having reportedly ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

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

But the Comprehensive Test Ban Treaty Organization said that there was insufficient data to confirm the allegation. Read more ...

Beijing/Seoul, South Korea (CNN) — President Donald Trump on Thursday vowed to begin testing US nuclear weapons “on an equal basis” with Russia and China, heralding a potentially major shift in ...

(CNN) — 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 ...

The U.S. is losing the hypersonic arms race to China—but a formidable, new weapon could change the game. When the U.S. Navy’s ...