Shooter, explosives test Team Hill Airmen
From the left, Senior Airman Alexander Sheridan, Airman 1st Class Dijon Edwards and Airman Vincent Duller, all 775th Civil Engineer Squadron, are detained as unknown individuals during an active shooter response exercise April 24 at Hill Air Force Base. (U.S. Air Force/Paul Holcomb)

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Photo by: Paul Holcomb |  VIRIN: 170424-F-QT350-0014.JPG