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- 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.