In 1953, Great Britain and the United States conspired together to overthrow the democratically elected government of Iran. This is an incredibly interesting story and provides a look into the mindset of world leaders in the 50s.
Tsutomu Yamaguchi was in Hiroshima on the day it was bombed by the US with the dropping of Little Boy, the first atomic bomb ever used in armed conflict. If that wasn't worse enough, he was also in Nagasaki days later when the second atomic bomb was dropped. This article discusses his life and the terrible details of both days.