The first prisoner of war to walk off the Nightingale is greeted by a member of the welcoming committee at Keesler Air Force Base in Mississippi. (Photo by author) Friday, March 29, marked the 51st anniversary of the completion of a mission that brought home 591 American Prisoners of War after the Vietnam War. I was a young serviceman at the time. These are my memories of one of those “returns” as told at the Huffington Post eleven years ago. I do not remember the exact date — I believe that it was late February or early March — but I do remember that it was a pleasant, sunny spring-like day o…