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

The U.S. Air Force launched a Minuteman III intercontinental ballistic missile from Vandenberg Space Force Base in California ...

The US tested a doomsday ballistic missile off the California coast Tuesday night — as war raged in the Middle East. The ...

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

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

Does a video show a nuclear test carried out by the Islamic Revolutionary Guard Corps (IRGC) in Iran? No, that's not true: The video clip shows a nuclear test in the Nevada desert in 1957. The ...

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

President Trump's comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to the bomb, but come as Washington's rivals ...

Trump wrote that he had instructed the Department of War to start testing nuclear weapons “on an equal basis” with China and Russia. But those instructions may have been sent to the wrong department.

DUBAI, United Arab Emirates (AP) — President Donald Trump’s comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to ...