Join Ann Curry for dramatic reunions between people who saved each other's lives in the midst of the Vietnam War, as a three-tour US Army officer searches for the Helicopter pilot who brought him out alive, and a soldier sets out to thank the young MASH surgeon who saved his leg from amputation and him from long-term disability five decades ago.More than two million U.S. soldiers served in the Vietnam War that lasted nearly a decade from 1964. It was a grueling conflict that divided Americans and killed nearly 60,000 service members, and yet two men who survived found that even in the horrors of war, there are acts of humanity that last the test of time.