SOUTHWEST ASIA - KC-10 Extender tanker aircraft sit on the 380th Air Expeditionary Wing flightline Dec. 23, 2011. The KC-10s, deployed from Travis Air Force Base, Calif., and Joint Base McGuire-Dix-Lakehurst, N.J., provide refueling for joint and coalition aircraft throughout the U.S. Central Command area of responsibility. Extender crews flew more than 4,000 missions, providing roughly 35 percent of all air refueling this year. (U.S. Air Force photo/Staff Sgt. J.G. Buzanowski)