Staff Sgt. Zach Zistl, F-22 Raptor dedicated crew chief, inspects the engine intake Sept. 12, 2019, at Dover Air Force Base, Del. Zistl is a member of the F-22 demonstration team from Joint Base Langley-Eustis, Va., that is scheduled to perform at the Thunder Over Dover 2019 open house and air show. (U.S. Air Force photo by Roland Balik)