Three days later, a second B-29 dropped another A-bomb on Nagasaki, killing an estimated 40,000 people.
The explosion immediately killed an estimated 80,000 people tens of thousands more would later die of radiation exposure.
On August 6, 1945, during World War II (1939-45), an American B-29 bomber dropped the world’s first deployed atomic bomb over the Japanese city of Hiroshima.
