Airman 1st Class Antonio Herrera, 28th Logistics Readiness Squadron petroleum oil and lubricants technician, fills up an R-11 fuel tank truck with jet fuel at Ellsworth Air Force Base, S.D., Sept. 17, 2013. The 28th LRS fuels flight produces more than 18 million gallons of quality petroleum products and cryogenic fluids annually for base assets. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)