According to bbc.com:
Tsutomu Yamaguchi was in Hiroshima on a business trip on 6 August 1945 when a US plane dropped the first atomic bomb.
He suffered serious burns and spent a night there before returning to his home city of Nagasaki just before it was bombed on 9 August.
He is now 93 years old.
Full story:
http://news.bbc.co.uk/2/hi/asia-pacific/7963581.stm
