Three KC-135 Stratotankers are shown parked on the flight line at Selfridge Air National Guard Base, Mich., July 17, 2011. The Selfridge-based tankers - and the Citizen-Airmen who fly, operate and maintain them - have been away from the base on several short-term deployments in 2011, including flying operations from bases in Germany, Guam and southwest Asia supporting Operation Enduring Freedom. The tankers at Selfridge are flown and maintained by the 127th Air Refueling Group, a component of the Michigan Air National Guard's 127th Wing. The KC-135s and their crews provide a variety of aerial refueling, cargo and troop transport and aeromedical evacuation capabilities to the U.S. Armed Forces. (USAF photo by SrA Brittany Simon)