A thousand feet beneath the desert, the United States conducts experiments to verify that its weapons work. But some fear a live test could come soon.

For this reason, most countries signed the Partial Test Ban Treaty of 1963, which banned all nuclear weapons testing save for that done underground. This later expanded into the Comprehensive ...

On Wednesday, North Korea once again drew the world's attention both to itself and to the devastating threat of nuclear weapons after it announced that it successfully tested a miniaturized ...