U.S. Navy sailors assigned to Electronic Attack Squadron 138, Whidbey Island, Wash., conduct pre-flight inspections on an EA-18G Growler prior to a Red Flag 15-3 night training sortie at Nellis Air Force Base, Nev., July 28, 2015. Red Flag gives aircrews and air support operations service members from various airframes, military services and allied countries an opportunity to integrate and practice combat operations. (U.S. Air Force photo by Senior Airman Joshua Kleinholz)