Senior Airman Facundo Santamina (left), 62nd Aircraft Maintenance Squadron crew chief and Staff Sgt. James Pomeroy, 62nd AMXS crew chief, inspect the wing of a C-17 Globemaster III aircraft March 20, 2017 at Joint Base Lewis-McChord, Wash. Crew chiefs have a large number of different duties they are trained in and perform regularly to ensure the safety of aircraft. (U.S. Air Force photo/Senior Airman Jacob Jimenez)