As hard as it may be for many Americans and Vietnamese Americans who have felt the battering hand of the Vietnam War for so many years, consider for a moment the small incandescence of last week’s United Airlines Flight 869 from San Francisco to Ho Chi Minh City (formerly Saigon), the first American commercial airliner to arrive at Tan Son Nhat airport since 1975. The last American jet that felt land in Vietnam was the final Pan Am jet as it departed during the fall of Saigon. I know it's asking a lot. Communists "won" that terrible war while American...