Ma Duece
After live-fire training at the Camp Gruber Training Center in eastern Oklahoma, 72nd Security Forces members return to Tinker and the Combat Arms facility June 10 to disassemble, clean and reassemble the M240B machine gun. Airmen 1st Class Ryan Irvin, front and Geoffrey Goodwill are one team cleaning the two-person weapon. The M240B weighs 27 pounds and can fire 650 to 950 rounds per minute against lightly-armored vehicles and personnel. (Air Force photos by Margo Wright)