Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

Decades after the Cold War ended, U.S. defense planners concluded that deploying massive megaton-yield gravity bombs over Europe was no longer realistic, leaving much of America’s nuclear arsenal ...

WASHINGTON − The agency responsible for building, maintaining, and storing America's nuclear weapons faces an internal review of its costly effort to reestablish mass production of nuclear warhead ...

Add Yahoo as a preferred source to see more of our stories on Google. The agency responsible for designing, building, maintaining and securing U.S. nuclear weapons is facing staff furloughs and its ...

Since the dawn of the nuclear age with the discovery of nuclear fission and the subsequent development of the atomic bomb under J. Robert Oppenheimer, humanity has grappled with a weapon capable of ...

(CNN) — As the world marks the 80th anniversary of the first use of a nuclear weapon, on the Japanese city of Hiroshima near the end of World War II, the planet is closer to seeing them used again ...

This week marks 80 years since the US dropped atomic bombs on Hiroshima and Nagasaki — killing an estimated 200,000 people. Historian Garrett Graff’s new book “The Devil Reached Toward the Sky” draws ...

During the Cold War the U.S. considered putting nuclear weapons on balloons and letting them float into enemy territory for a strike.

Eighty years ago, a weapon was used which would transform modern warfare and the entire world forever. Hiroshima, in Japan, was the target of the first ever nuclear weapon, dropped by the US Air Force ...