U.S. Air Force Master Sgt. Donald Stichter, 52nd Equipment Maintenance Squadron NCO in charge of munitions inspection from Lakewood, Colo., smiles for a portrait July 3, 2014, at Spangdahlem Air Base, Germany. To help train for the ING Luxembourg Night Marathon, Stichter used all four pillars of comprehensive fitness: mental, physical, spiritual, and social. (U.S. Air Force photo by Senior Airman Rusty Frank/Released)