A U.S. Air Force Airman assigned to the 633rd Security Forces Squadron fires an M-9 Berretta during a field training exercise at Joint Base Langley-Eustis, Virginia, April 11, 2019. Security Forces is the Air Force’s largest enlisted career field and their primary mission is defending America’s resources regardless of location, mission and command. (U.S. Air Force photo by Senior Airman Anthony Nin Leclerec)