Staff Sgt. Ricky Anthony, 60th Logistics Readiness Squadron refueling maintenance supervisor, and Senior Airman Landon Sester, 60th LRS refueling maintenance technician, demonstrate how to drain fuel from an R-12 hydrant servicing vehicle June 17, 2012, in the refueling maintenance shop at Travis Air Force Base, Calif. Travis uses two types of trucks to refuel aircraft both of which are critical to the mission. (U.S. Air Force photo/Staff Sgt. Patrick Harrower)