Nagasaki Day is observed on 9 August. On this day US dropped an atomic bomb on the Nagasaki city of Japan in 1945 during World War II. The first bomb was dropped on the city of Hiroshima and the second was dropped on Nagasaki on 9 August which killed around 74,000 people or more. Bomb that was dropped on Nagasaki was known as “Fat Man” . Plutonium bomb exploded over Nagasaki just two days later on 9 August levelled 6.7 km square of the city and killed around 74,000 people by the end of 1945. The temperature of the ground reached 4,000 degrees Celsius and radioactive rain poured down. On 15 August 1945, the Japanese Emperor announced the surrender and ‘Victory in Japan’ or ‘V-J Day’ celebrations broke out across the United States and other Allied nations.