Members of the 51st Security Forces Squadron respond to a simulated ground attack during Operational Readiness Exercise Beverly Midnight 13-03 Aug. 8, 2013, at Osan Air Base, Korea. This is the base’s fourth simulated wartime contingency exercise in 2013. The exercises test the base's ability to defend and execute the mission in a heightened state of readiness. (U.S. Air Force photo by Staff Sgt. Emerson NuÒez)
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