A 173rd Fighter Wing F-15C dedicated crew chief signals to a U.S. Air Force F-15C Eagle before a sortie at Eglin Air Force Base, Fla., May 10, 2021. The 173rd Fighter Wing flew to Eglin Air Force Base from May 1-15 to support F-35A Lightning II B-Course students by serving as adversary air opponents. (U.S. Air National Guard Photo by Senior Airman Adam Smith)