Senior Master Sgt. Dan Quasius, a boom operator from the 908th Expeditionary Air Refueling Squadron, performs a pre-flight oxygen system check on a KC-10 Extender at an undisclosed location in Southwest Asia, on Feb. 24, 2012. The 908th EARS provides critical air refueling to aircraft in the area of responsibility, delivering more than one million gallons of fuel to the fight every day. In 2011, the 908th EARS offloaded more than 390 million pounds of fuel to more than 28,000 aircraft, and flew more than 36,700 hours in almost 4,600 missions. The average sortie length for a KC-10 mission in Southwest Asia is about eight hours.(U.S. Air Force photo/Staff Sgt. Greg C. Biondo)