Defenders complete active shooter training

Defenders with the 307th Security Forces Squadron use an M-4 carbine while running through various scenarios during an active shooter exercise at Barksdale Air Force Base, La., May 31, 2017. The M-4 carbine is a variant of the M-16A2 assault rifle which uses a 5.56×45mm NATO round. During the training simulated paint rounds were used to provide defenders crucial live-fire training without the using lethal ammunition. (U.S. Air Force photo by Staff Sgt. Jason McCasland)

PHOTO BY: Staff Sgt. Jason McCasland
VIRIN: 170531-F-IC265-025.JPG
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