WRIGHT-PATTERSON AIR FORCE BASE, Ohio – Tech. Sgt. Aaron Bullucks, 445th Maintenance Squadron aircraft structural maintenance craftsman, operates a drill press preparing a jet engine pylon cowling for the replacement of mounting fasteners on April 11, 2015. The repair was essential for keeping a C-17 Globemaster III mission ready. (U.S. Air Force photo/Senior Airman Devin Long)