A U.S. Air Force KC-135R Stratotanker assigned to the 909th Air Refueling Squadron from Kadena Air Base, Japan, refuels an F-16C Fighting Falcon assigned to the 96th Test and Evaluation Squadron from Eglin Air Force Base, Fla., during exercise Northern Edge, May 16, 2019, over Alaska. With participants and assets from the U.S Air Force, Marine Corps and Navy, Northern Edge is Alaska’s premier joint-training exercise designed to practice operations and enhanced interoperability among the services. (U.S. Air Force photo by Staff Sgt. Micaiah Anthony)