U.S. Air Force Airman 1st Class Noah Lovett, an aircraft avionics specialist assigned to the 19th Aircraft Maintenance Squadron, scans the horizon at Alpena Combat Readiness Training Center, Michigan, May 21, 2021. Conducted biennially, Mobility Guardian is the Air Force’s only formal, Total Force, service-level mechanism for assessing and validating capabilities in Rapid Global Mobility missions specified and implied within the 2018 National Defense Strategy. (U.S. Air Force photo by Staff Sgt. Joseph Pick)