Active shooter exercise

Staff Sgt. Cody Westbrook (from top to bottom), Tech. Sgt. John Twomey and Staff Sgts. Jacob White and Katherine Portes enter the lobby of the Brown Building during an active shooter exercise at Hanscom Air Force Base Sept. 5. The 66th Security Forces Squadron along with other agencies on base practiced their response to an active shooter incident as part of a base readiness exercise. (U.S. Air Force photo by Mark Herlihy)

PHOTO BY: Mark Herlihy
VIRIN: 140905-F-JW594-073.JPG
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