Staff Sgt. David Nicholson, 779th Aerospace Medical Squadron NCO in charge of presidential support, runs multiple times a week during his lunch-hour in preparation for the upcoming Joint Base Andrews Half Marathon taking place April 20, 2013. Nicholson ran his first half marathon in Seoul, South Korea and said he knew that running would always be part of his life when he crossed the finish line that day. (U.S. Air Force photo/Staff Sgt. Brittany E. Jones)