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

In a move that sent tremors through the global security landscape, the United States, in February 2026, publicly accused ...

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

A Ministry of National Defense spokesman said in a statement that China keeps its nuclear forces at the minimum level required for national security.

Beijing and Moscow build their arsenals while the U.S. restrains itself.

State Department alleges China conducted nuclear test in 2020, reigniting debate over U.S. testing moratorium and ...

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on ...

While China is expanding its nuclear arsenal at a dramatic pace, Russia and the U.S. are also testing new delivery platforms.

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 ...

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

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 ...

A brand-new nuclear reactor is set to undergo testing at the Utah San Rafael Energy Lab in Orangeville, Utah. That's about ...