At sundown they carried the prisoner on a stretcher to a soccer field at Saigon's Chi Hoa prison. A slight man with greying hair and steel-rimmed spectacles, ailing from diabetes and a heart attack, he was lifted to his feet by three guards, hung slackly against them for a few seconds. Then he walked slowly by himself across the sparse grass, murmuring responses to the pith-helmeted Roman Catholic priest who accompanied him.
The prisoner was strapped to a wooden stake and, against his wishes, blindfolded with a black scarf. Then a military police captain barked an order to the black-helmeted, ten-man...