A KC-135 Tanker, from the 185th Air Refueling Wing (ARW) Sioux City, Iowa, Iowa Air National Guard, receives fuel from Leading Aircrafts Men (LAC) Greg McMahon, at the Royal Australian Air Force (RAAF) Base, Williamtown, New South Wales, Australia, on February 23, 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)