On August 9, 1945, a U.S. B-29 bomber dropped an atomic bomb nicknamed "Fat Man" on the Japanese city of Nagasaki three days after the atomic bombing of Hiroshima.

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 than it has been in decades,

On August 6, 1945, a 10-foot-long uranium bomb called "Little Boy" was dropped on the Japanese city of Hiroshima.