Staff Sgt. Felix Irving, 28th Maintenance Squadron aircraft structural maintenance craftsman, preps and sands a B-1B Lancer door in the corrosion control facility paint booth on Ellsworth Air Force Base, S.D., Oct. 12, 2011. Irving was prepping the door for paint, to ensure the aircraft is ready to fly safely in support of any national objectives. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)