Members of Marine Tactical Electronic Warfare Squadron 4, Marine Corps Air Station Cherry Point, N.C., gather around an EA-6B Prowler prior to a Red Flag 15-3 sortie at Nellis Air Force Base, Nev., July 13, 2015. Various units from around the Air Force, joint branches and coalition partners converge on Nellis AFB three to four times a year to take part in the exercise, which simulates large-scale live, virtual and constructive warfare.