Staff Sgt. Mario Balderrama, 921st Contingency Response Squadron force protection journeyman, fires a simulated round while taking cover behind an MRZR all-terrain vehicle during an ambush scenario Oct. 17, 2020, during exercise Green Flag 21-01 at Little Rock Air Force Base, Arkansas. Balderrama and his defender counterparts are responsible for the safety and security of the unit while deployed. (U.S. Air Force photo)