LUKE AIR FORCE BASE, Ariz.
Staff Sgt. Eric Olson, 56th Equipment Maintenance Squadron aircraft structural maintenance craftsman, works with Airman 1st Class Joshua Perry, 56th EMS aircraft structural maintenance apprentice, to copy a blueprint onto a sheet of metal at Luke Air Force Base, Arizona, Oct. 30, 2015. (U.S. Air Force photo by Senior Airman James Hensley)