A U.S. Air Force F-16 Fighting Falcon assigned to the 36th Fighter Squadron out of Osan Air Base, Republic of Korea, flies in formation next to a KC-135 Stratotanker aircraft while waiting to refuel Oct. 10, 2016, during a RED FLAG-Alaska (RF-A) 17-1 mission. RF-A is a series of Pacific Air Forces commander-directed field training exercises conducted within the Joint Pacific Alaska Range Complex, which provides a realistic training environment and allows commanders to train for full spectrum engagements ranging from individual skills to complex, large-scale joint missions. (U.S. Air Force photo by Master Sgt. Karen J. Tomasik)