U.S. Air Force Master Sgt. Greg Carte, 173rd Fighter Wing weapons shop, inspects a part from the rotary cannon the F-15C uses for strafing, June 27, 2019 at Kingsley Field in Klamath Falls, Oregon. These feed mechanism parts are growing rare and are very difficult to source through the supply system, making his expertise in repairing them a valuable skill for the entire fleet of F-15C aircraft. (U.S. Air National Guard photo by Master Sgt. Jefferson Thompson)