On that day in 1985, Minh appeared up at Tiernan with a hint of a wistful smile and held out a flower he had common from the aluminum wrapper in a pack of cigarettes. The photograph Tiernan snapped of him was printed in newspapers around the globe. After being defeated at Dien Bien Phu in 1954 and compelled to withdraw from Vietnam after almost a century of colonial rule, France shortly evacuated 25,000...