Douglas Brian "Pete" Peterson was a US Air Force pilot who spent over six years (September 10, 1966–March 4, 1973) as a prisoner of the Vietcong after his plane was shot down during the Vietnam War. He returned to Hanoi in 1997 as the first U.S. ambassador to the Socialist Republic of Vietnam, with the goal of securing an account of those still listed as missing in action from the war. He was an ambassador until 2001. Wikipedia
The definitive Wikipedia entry for Pete Peterson. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Pete_Peterson