U.S. Air Force Staff Sgt. Michael Christie, a mechanic with the 173rd Fighter Wing propulsion shop, explains how they care for titanium fan blades from F-15 engines to visiting 56th Fighter Wing Command Chief Master Sgt. Daniel Weimer, Luke Air Force Base, Arizona, Oct. 26, 2020. The visit serves as an opportunity for the active duty command structure to visit their geographically separated Airmen assigned to the 550th Fighter Squadron, the active association at the 173rd Fighter Wing at Kingsley Field in Klamath Falls, Oregon. (U.S. Air National Guard photo by Master Sgt. Jefferson Thompson)