John McCain has won an unusual endorsement for his presidential campaign - from the man who was his jailer in wartime Vietnam. John McCain was shot down and badly wounded while bombing a Hanoi power station on his 23rd mission over North Vietnam in 1967. He was a prisoner for over five years. Because Mr McCain's father was commander of all American forces in the Pacific theatre, the Vietnamese called him "the prince". Tran Trong Duyet, the commandant of Hao Lo prison in Hanoi from 1968-73, recalls Mr McCain "as a typical child of a traditional military family. He was...