JOINT BASE LANGLEY-EUSTIS, Va. – U.S. Air Force Staff Sgt. Audra Sensor, 633d Medical Group aerospace medical technician, (left), and Senior Airman Brittney Norwood, 633d MDG medic, disassemble the bolt carrier from their M-4 carbine rifles during their Combat Arms Training and Maintenance qualification course at Joint Base Langley-Eustis, Virginia, Nov. 30, 2022. The bolt carrier enables the fired shell to be extracted and reloads a new round for firing. (U.S. Air Force photo by Airman 1st Class Olivia Bithell)