U.S. Marine Corps AV-8B Harrier ground attack aircraft assigned to Marine Attack Squadron 311, Marine Corps Air Station Yuma, Ariz., take off for a sortie from Eielson Air Force Base, Alaska, Oct. 6, 2014, during RED FLAG-Alaska 15-1. RF-A is a series of Pacific Air Forces commander-directed field training exercises for U.S. and partner nation forces, providing combined offensive counter-air, interdiction, close air support and large force employment training in a simulated combat environment. (U.S. Air Force photo by Senior Airman Peter Reft/Released)