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Senior Airman Ryan Smith, 379th Expeditionary Medical Group Bioenvironmental environmental program manager, spray paints a pallet of bottled water July 20, 2012. After each lot of water has been cleared and deemed safe for consumption, Smith marks the pallet of water with a large, yellow ‘C’. He conducts bacteriological tests on every batch of water received. (U.S. Air Force photo/Senior Airman Bryan Swink)
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