U.S. Army engineers and combat engineers with the 6th Brigade Engineer Battalion, 4th Brigade Combat Team (Airborne), 25th Infantry Division, jump out of a U.S. Air Force C-17 Globemaster III aircraft into Allen Army Airfield at Fort Greely, Alaska, as part of Exercise Northern Edge, June 17, 2015. Northern Edge 2015 is Alaska’s premier joint training exercise designed to practice operations, 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)