In this April 11, 2015, photo, Bill Ervin, a former U.S. Marine from Colorado who now runs a travel company with his Vietnamese wife, reacts while playing poker with fellow Vietnam war veterans at his house in Danang, Vietnam. The presence of American war veterans in today's Vietnam - and the warm welcome they usually receive - is yet another sign of how much the U.S.-Vietnamese relationship has evolved since the countries normalized relations in 1995. (AP Photo/Hau Dinh)
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