The last time someone received a second Medal of Honor was in World War I, and it's unlikely we'll ever see another two-time recipient in our lifetime. But if anyone were going to come close to receiving multiple Medals of Honor, it would have been U.S. Army Col. Robert Lewis Howard. During his 54 months of active combat service in Vietnam, he was wounded an astonishing 14 times and received eight Purple Hearts and four Bronze Stars. He was also nominated for the Medal of Honor three times in...