The U.S. hasn’t detonated a nuclear weapon since 1992. Now a fusion start-up whose co-founders include former national lab ...

France has an estimated 290 nuclear warheads, most of which are launched from submarines.

North Korea’s interest in nuclear weapons was decades in the making—but its first earnest attempt during the 1990s was ...

Eventually, they concluded it was Gilju County, an area in North Korea's northernmost province. What Seoul's equipment was ...

An expert on military escalation, Pape warned Sunday that Tehran could carry out a nuclear weapons test as part of an effort to confront President Donald Trump with a major military and political ...

UNITED NATIONS — With the U.S., Russia, China and other countries that have nuclear weapons refusing to ratify the treaty that bans atomic testing, the United Nations warned on Monday that any new ...

Get full access to The Daily Beast for $1 Donald Trump previously claimed Russia and China were already testing weapons. Getty The Russian president has ordered his generals to begin testing nuclear ...

Learn why thousands of soldiers were deliberately exposed to radiation from a nuclear bomb in the Soviet Union, and why other nations did the same. The Totskoye Nuclear Exercise occurred in September ...