Support WBUR35 Years On, Vietnam Heroes Reunited, DecoratedPlay07:46Download AudioJoseph ShapiroSeptember 01, 2010 ShareCrew members of the USS Kirk try to wave off a CH-47 Chinook carrying South Vietnamese refugees on April 29, 1975. But the helicopter's pilot, Ba Nguyen, was determined to unload his passengers, who included his wife and three young children.