Joint forces partake in Arctic Challenge
U.S. Air Force Staff Sgt. Keith Shaff, 100th Aircraft Maintenance Squadron dedicated flying crew chief, conducts a pre-flight inspection on a KC-135R Stratotanker Sept. 16, 2013, on Ørland Main Air Station, Norway. Shaff and other maintainers kept aircraft ready to carry out a multitude of missions during the Arctic Challenge exercise, which included participation from Sweden, Finland, the U.K., Norway, the U.S. and NATO. (U.S. Air Force photo by 1st Lt. Christopher Mesnard/Released)