No fuel, no fight
BAGRAM AIR BASE, Afghanistan -- Staff Sgts. William Paholak (left) and Christopher Lund prepare to refill a liquid-oxygen cart here. Nighttime brings a near-total dark to the flightline, which necessitates wearing might-vision goggles to do their jobs. Both airmen are fuels specialists assigned to the 455th Expeditionary Operations Group. (U.S. Air Force photo by Tech. Sgt. Brian Davidson)