** FILE ** In this Sept. 14, 1973, file photo John McCain is greeted by President Richard Nixon, left, in Washington, after McCain spent more than five years in a Vietnamese prisoner of war camp, know as the "Hanoi Hilton", before being released in March 1973. Prodded on the 2008 campaign trail to talk about his compelling personal story, McCain usually demurs. "I'm very reluctant to do so, as you know," he says. (AP Photo/File)