A U.S. Air Force F-16 Fighting Falcon assigned to the 354th Fighter Wing, Eielson Air Force Base, Alaska, conducts a training mission over the Joint Pacific Alaska Range Complex June 16, 2015, during Exercise Northern Edge 15. Northern Edge is Alaska’s premier joint training exercise designed to practice operations, techniques and procedures as well as enhance interoperability among the services. Thousands of service members from active duty, Reserve and National Guard units are involved. (U.S. Marine Corps photo by Cpl. Suzanne Dickson)