The second atomic bomb dropped on Japan by the United States in World War II struck the city of Nagasaki.

3 days after the United States dropped an atomic bomb on the Japanese city of Hiroshima, the city of Nagasaki was destroyed by a 21 kiloton atomic bomb nicknamed Fat Boy. About 40 to 80 thousand people were estimated killed during this American-led attack towards the end of the Second World War. A few days later on August 15, Japan surrendered to the Allies, effectively bringing the War to a close by September, 1945.