U.S. Air Force Senior Airman Aurelio Felix, a vehicle maintainer with the 407th Expeditionary Logistics Readiness Squadron, works on a Bomag Roller engine at Ail Air Base, Iraq, on July 30, 2008. The vehicle maintenance shop is in charge of maintaining all Air Force vehicle assets, which includes more than 300 vehicles and other heavy machinery. Due to the severe heat and sandy conditions in Iraq, vehicle oil changes are accomplished more frequently and various components have increased failure rates.