U.S. Air Force Airmen set up a line-of-sight radio antenna on top of a communications trailer during Maple Flag 47 in Edmonton/Cold Lake, Alberta, Canada, May 26, 2014. Maple Flag is an international exercise designed to enhance the interoperability of C-130 aircrews, maintainers and support specialists in a simulated combat environment. (U.S. Air Force photo by Tech. Sgt. Matthew Smith/Released)