Type III Constant Pressure System
Tech. Sgt. Jeremy Whitworth and Staff Sgt. Aaron Simmons, both from the 455th Expeditionary Logistics Readiness Squadron, pull a hydrant hose from a new R-12 hydrant servicing vehicle at Bagram Airfield, Afghanistan, Dec. 21, 2010. The squadron recently received five HSVs and completed the new Type III constant pressure system became fully operational and will significantly increase refueling capabilities. Sergeant Whitworth is a native from Calif., and Sergeant Simmons is a native from Vt. (DoD photo by U.S. Air Force Senior Airman Sheila deVera/RELEASED)