** ADVANCE FOR WEEKEND OF AUG. 23-24 AND THEREAFTER - FILE ** In this Nov. 7, 1991 file photo, Sen. John McCain, R-Ariz., left, is hugged by Col. Bui Tin, the former commander of the North Vietnamese military prison operation called the "Hanoi Hilton", during a hearing on Capitol Hill. Tin oversaw the prison operation where McCain was held for over five years. McCain told the Associated Press that Vietnam "wasn't a turning point in me as to what type of person I am, but it was a bit of a turning point in me appreciating the value of serving a cause greater than your self-interest." (AP Photo/Dennis Cook, File)