An aerial photograph of Hiroshima shortly after the
An aerial photograph of Hiroshima shortly after the "Little Boy" atomic bomb was dropped in 1945
  • In May 1945, during the final months of World War II, Germany had surrendered to the Allies but Japan refused.
  • President Harry Truman wanted to finish the war quickly. His government decided to drop the world's first atomic bomb on Hiroshima.
  • On August 6, the atomic bomb "Little Boy" was dropped on Hiroshima, instantly leveling five square miles and killing an estimated 80,000 people.

On August 6, 1945, a 10-foot-long uranium bomb that weighed 9,788 pounds called "Little Boy" was dropped on the Japanese city of Hiroshima.