Michigan Air National Guard power production Airmen from the 110th Civil Engineer Squadron and the Alpena Combat Readiness Training Center (CRTC) walk on the runway June 8, 2021, at the Alpena Combat Readiness Training Center, Michigan. The Alpena CRTC replaced their aircraft arresting system, which is designed to help stop aircraft with tail hooks in case of emergency. (U.S. Air National Guard photo by Staff Sgt. Tristan D. Viglianco)