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’ indicating it is cleared for consumption by Airmen. (U.S. Air Force photo/Senior Airman Bryan Swink)