"Pilots are pedestrians without fuel."
Airman 1st Class James Williams, 2 CES Water and Fuel Systems Maintenance Apprentice, performs operational checks of Programmable Logic Controllers for one of Barksdale's hydrant refueling systems, May 22, 2012. All fuel systems are closely monitored to provide clean, dry fuel for aircraft and government vehicles. (U.S. Air Force photo by Senior Airman Micaiah Anthony)