U.S. Air Force Master Sgt. Greg Carte, 173rd Fighter Wing weapons shop, disassembles a part from the feed mechanism for the F-15C rotary cannon as he works to refurbish it and put it back into service in an aircraft, June 27, 2019 at Kingsley Field in Klamath Falls, Oregon. These parts have grown so scarce that without his ability to fix them the fleet would conceivably be forced to go without or go to the great expense of striking a contract to have the parts re-created. (U.S. Air National Guard photo by Tech. Sgt. Jefferson Thompson)