Staff Sgt. Evan Spitzer, 28th Civil Engineer Squadron electrical systems craftsman, disconnects a centerline light during maintenance on a taxiway at Ellsworth Air Force Base, S.D., Feb. 16, 2012. Fifty-five lights illuminate the Ellsworth flightline to give aircrews a visual reference during taxi. Airmen quickly respond to fix any broken lights to ensure the flightline remains illuminated. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)