507th ARW
160110-F-OW851-026
Airmen from the 507th Air Refueling Wing load ammunition into magazines in below freezing temperatures Jan. 10, 2016, at the gun range at Tinker Air Force Base, Okla. Airmen are required to demonstrate their proficiency on the M-4 carbine by completing combat arms training, through classroom instruction and hands-on training on the firing range. (U.S. Air Force photo/Tech. Sgt. Charles Taylor)