Throughout history only two cities were destroyed by nuclear bombs. Tsutomu Yamaguchi was present in both cities at the time of the blast and just two miles away from where the bombs hit.
On August 6, 1945 Yamaguchi was sent to Hiroshima by his employer, and as soon as he left the tram, an nuclear bomb exploded about two miles away.
Yamaguchi was temporarily blinded, his ear drum burst from the loud sound of the bomb, and after spending the night in a war shelter, he decided to go back to his hometown of Nagasaki.
A few days later in Nagasaki, Yamaguchi was at work, probably thinking about how lucky he was to have survived the nuclear blast that destroyed Hiroshima. All of a sudden there was a blast again: the second nuclear bomb exploded just two miles from his position.
Fortunately, Yamaguchi survived again and he's still alive today, at over 90 years of age. He used his stroy to write books and give lectures educating people around the world about the dangers of nuclear bombs.