Tech. Sgt. Darin Winfree, with the 185th Air Refueling Wing (ARW), Sioux City, Iowa, Iowa Air National Guard, installs a drogue on a KC-135 Tanker, which will refuel an Australian F-18 Fighter Jet, at the Royal Australian Air Force (RAFF) Base, Williamtown, New South Wales, Australia, on February 22, 2011. The 185th ARW is participating in a joint flight exercise, "Sentry Down Under", refueling F-16C and F-18 Fighter Jets in Australia. (USAF Photo/ Tech. Sgt. Oscar M. Sanchez-Alvarez)