Engine maintenance
Staff Sgt. Joe Wilhoit, a sheet metal specialist with the 127th Wing, Michigan Air National Guard, works on the engine housing on an A-10 Thunderbolt II at Selfridge Air National Guard Base, Mich., Jan. 6, 2018. The aircraft is flown by the Red Devils of the 107th Fighter Squadron. (U.S. Air National Guard photo by Tech. Sgt. Dan Heaton)