The second atomic bomb was dropped on Nagasaki by the US. The bomb, nicknamed "Fat Man", destroyed 30% of the industry district. Nearly 74 000 were killed and a similar number injured. However, the impact was not as bad as Hiroshima, due to the uneven terrain at Nagasaki http://news.bbc.co.uk/onthisday/hi/dates/stories/august/9/newsid_3580000/3580143.stm
The big three allied leaders, President Harry S Truman, Josef Stalin and Winston Churchill, decided a suitable punishment for Germany and also a way to end the war with Japan