U.S. Air Force Staff Sgt. Gerard Gutierrez, 821st Contingency Response Squadron air transportation specialist, signals to a K-loader May 25, 2021, during exercise Mobility Guardian 2021 at Oscoda-Wurtsmith Airport, in Oscoda, Michigan. Mobility Guardian is a training exercise to prepare Airmen to face real-world security challenges and sustain strategic deterrence anywhere and at any time. (U.S. Air Force photo by Airman 1st Class Matthew Porter)