Staff Sgt. Steven Staab, 51st Aerospace Medicine Squadron NCO in charge of radiation, opens a bag with an air sample during Operational Readiness Exercise Beverly Midnight 15-1 March 4, 2015, at Osan Air Base, Republic of Korea. The sample is tested to determine if the air is containmined with biological agents. (U.S. Air Force photo by Senior Airman Matthew Lancaster)
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