(CNN) – Traveling to Vietnam with Sen. John McCain a few years ago, it was clear to me just how far the relationship between two former enemies had come.
Viewing the dark cells of Hoa Lo Prison -- the "Hanoi Hilton" that housed American prisoners of war -- invited memories of a long and bitter war. A statue of McCain that stands beside Truc Bach Lake in central Hanoi marks the spot where his A-4E Skyhawk was shot down in 1967. Visiting Haiphong recalled the intensity of conflict in that once-embattled harbor.
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