Testing fuel
Staff Sgt. Benny Cruz, 8th Logistics Readiness Squadron fuels lab NCO in charge, takes samples of jet fuel from the base supply at Kunsan Air Base, Republic of Korea, Sept. 4, 2012. The petroleum, oil and lubricant flight manages the largest fuels account in the Department of Defense, issuing more than 15 million gallons of fuel a year. (U.S. Air Force photo/Senior Airman Brigitte N. Brantley)