Airmen from the 72nd Security Forces Squadron work together during an active shooter exercise to detain mock shooter, Tech. Sgt. Darryl Lindgens, Aug. 12 in the 507th Air Refueling Wing headquarters building as senior controller Scott Lindsey, with the 72nd ABW Inspector General Inspections, evaluates. This is the third active shooter exercise performed on Tinker Air Force Base this year. (Air Force photo by Tech. Sgt. Lauren Gleason)

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Photo by: Staff Sgt. Lauren Gleason |  VIRIN: 150811-F-EW270-015.JPG