Staff Sgt. Peter Christensen, 88th Security Forces Squadron patrolman, cuffs Staff Sgt. Zachary Herick, 88th Air Base Wing Safety office, while Airman 1st Class Valeri Chia, 88th SFS patrolman, provides cover during active-shooter exercise, Jan. 30, 2017, at Wright-Patterson Air Force Base, Ohio. Evaluators and observers from the squadron’s Standardization and Evaluations office watched the responders during the exercise to see what was done well and where improvements could be made. (U.S. Air Force photo by R.J. Oriez)
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