EIELSON AIR FORCE BASE, Alaska – U.S. Air Force F-15C Eagles assigned to the 67th Fighter Squadron out of Kadena Air Base, Japan, fly behind a KC-135T Stratotanker from Fairchild Air Force Base, Wash., May 9, 2017, during NORTHERN EDGE 2017 (NE17), over the Joint Pacific-Alaska Range Complex. NE17 is Alaska’s premier joint training exercise designed to practice operations, techniques and procedures as well as enhance interoperability among the services. Thousands of participants from all the services, Airmen, Soldiers, Sailors, Marines and Coast Guardsmen from active duty, Reserve and National Guard units are involved. (U.S. Air Force photo/Staff Sgt. Ashley Nicole Taylor)