U.S. Navy sailors assigned to Electronic Attack Squadron 138, Naval Air Station 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. The introduction of low-visibility conditions presents aircrews with a number of challenges that test their ability to perform the mission at any time, day or night.