Another McCain story, somewhat better known, is about the Vietnamese practice of torturing him by tying his head between his ankles with his arms behind him, and then leaving him for hours. The torture so badly busted up his shoulders that to this day Mr. McCain can't raise his arms over his head.

One night, a Vietnamese guard loosened his bonds, returning at the end of his watch to tighten them again so no one would notice. Shortly after, on Christmas Day, the same guard stood beside Mr. McCain in the prison yard and drew a cross in the sand before erasing it. Mr. McCain later said that when he returned to Vietnam for the first time after the war, the only person he really wanted to meet was that guard.