U.S. Air Force Staff Sgt. Daniel Klinger, 380th Expeditionary Logistics Readiness Squadron Petroleum, Oils and Lubricants flight, pulls a fuel sample from a fuel truck July 16, 2012. Klinger, NCO in charge of the fuels laboratory, is a Tomball, Texas, native and is deployed from Eielson Air Force Base, Alaska. (U.S. Air Force photo/Master Sgt. Scott MacKay)