U.S. Air Force Master Sgt. John Sperling, 354th Communications Squadron NCO in charge of radio frequency transmissions, connects an ultra-high frequency radio cable to the outside antenna in order to relay exercise communications back to Joint Base Elmendorf-Richardson. NORTHERN EDGE 2015 is Alaska's premier joint training exercise designed to practice operations, techniques and procedures as well as enhance interoperability among the services. (Courtesy photo)