This video is a moving tribute to honor an outstanding young Marine Officer by his father, Dr. Bill Kristoff. At the age of 61, Dr. Bill Kristoff of Truckee, CA joined the U.S. Navy Medical Corps in order to honor the memory of his oldest son by serving as a surgeon in Afghanistan to treat wounded Marines. While doing some further research on this amazing family, I found this: The outdoor activities were a joy shared by Nathan, his father, and his younger brother, Austin, 24, who joined the Marines shortly before Nathan died.The family kept word of Nathan's death...