A U.S. Air Force F-16 Fighting Falcon fighter aircraft assigned to the 35th Fighter Squadron, Kunsan Air Base, South Korea, takes off for a sortie at 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)