The Tsar Bomba wasn’t just a bomb—it was a message. In 1961, the Soviet Union detonated the largest nuclear weapon ever built ...

A new study offers insights into how the United States reacted to Tsar Bomba, a planet shaker that made the deadly Hiroshima blast look tame. By William J. Broad Sixty years ago on Saturday, the ...

The bomb dropped on Hiroshima, "Little Boy," had an explosive yield of 15 kilotons. The B61-13, assuming it has the same yield as the B61-7, is roughly 24 times more powerful.

On August 6, 1945, during World War II, the United States dropped an atomic bomb on the city of Hiroshima, resulting in an estimated 140,000 deaths. At the time of the bombing, Hiroshima was home ...