Crewmembers work on an F-22 Raptor from the 525 Fighter Squadron, after it returns from a mission during exercise Northern Edge 2015 at Joint Base Elmendorf-Richardson, Alaska, June 18, 2015. Northern Edge is Alaska’s premier joint training exercise designed to practice operations, techniques and procedures, as well as enhance interoperability among the services. (U.S. Air Force photo/Staff Sgt. William Banton)