Staff Sgt. Dan Antonio Deldingco, 627th Security Forces Squadron Combat Arms Training and Maintenance (CATM) instructor, teaches a class on how to properly handle and use an M-4 carbine at Joint Base Lewis-McChord, Wash., Jan. 31, 2018. The purpose of CATM is to train and qualify Airmen on the characteristics, nomenclature, assembly and disassembly, maintenance and firing of small-arm weapons such as the M-4. ( Air Force photo by Senior Airman Tryphena Mayhugh)

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