Staff Sgt. David Nicholson, 779th Aerospace Medical Squadron NCO in charge of presidential support, runs on an outdoor track April 10, 2013 at Joint Base Andrews, Md. Nicholson is preparing to particpate in the upcoming JBA Half Marathon by running during his lunch hour and on trails in Northern Virginia on the weekends. (U.S. Air Force photo/Staff Sgt. Brittany E.Jones)