An F-16 Fighting Falcon aircraft approaches a KC-135 Stratotanker aircraft for in-flight refueling during Exercise Red Flag-Alaska 11-1 over Eielson Air Force Base, Alaska, on April 26, 2011. Red Flag-Alaska is a series of Pacific Air Forces commander-directed field training exercises for U.S. forces, providing joint offensive counter-air, interdiction, close air support, and large force employment training in a simulated combat environment.