Vietnam - US Prisoner of War
In August 1964, US Navy pilot, Everett Alvarez, was shot down over the Gulf of Tonkin by communist North Vietnamese forces. He spent more than 8 years in captivity, suffering physical and psychological torture. He is one of the longest-held American POWs ever.
Photo: Everett Alvarez (left) and other POWs on their release in 1973. Credit: Getty Images.