Staff Sgt. David Nicholson, 779th Aerospace Medical Squadron NCO in charge of presidential support, runs during his lunch hour April 8, 2013 at Joint Base Andrews, Md., to prepare for the upcoming JBA Half Marathon. Nicholson said he knew running would always be part of his life when he crossed the finish line during his first half marathon in Seoul, South Korea. (U.S. Air Force photo/Staff Sgt. Brittany E.Jones)