Active Shooter Exercise

U.S. Air Force Staff Sgt. David Griffin, 161st Security Forces Squadron member, executes 360 degrees of surveillance as part of a simulated active shooter exercise at the 161st Air Refueling Guard base, Phoenix, June 4, 2011. This exercise brings together members of the Air National Guard, the Phoenix Police Department, the Federal Aviation Administration and the Transportation Security Agency in order to improve interagency communication. (U.S. Air Force photo by Staff Sgt. Courtney Enos/Released)

PHOTO BY: Staff Sgt. Courtney EnosReleased
VIRIN: 110603-F-XM694-081.JPG
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