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

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

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

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

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t ...

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

America’s last nuclear detonation was nothing special. Smaller than the bomb that killed 73,000 people in Nagasaki, it exploded 1,397 feet below the Nevada desert. It shook the ground, created a ...

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement ...

From Trinity’s fallout to a New Mexico school underground, “Nuclear Family” traces how the bomb reshaped one family and a ...