A U.S. Air Force C-17 Globemaster III transport aircraft with the 249th Airlift Squadron lands on an assault landing strip in the Donnelly Training Area, Alaska, as part of Exercise Northern Edge, June 25, 2015. Northern Edge 2015 is Alaska’s joint training exercise designed to practice operations, tactics, techniques and procedures as well as enhance interoperability among the services. Thousands of Airmen, Soldiers, Sailors, Marines and Coast Guardsmen from active duty, reserve and National Guard units are involved. (U.S. Marine Corps photo by Cpl. Tyler S. Giguere/Released)