An F-16 Fighting Falcon from the 354th Fighter Wing at Eielson Air Force Base, Alaska, is refueled by a KC-135 Stratotanker from Fairchild Air Force Base, Washington, May 4, 2015, during Red Flag-Alaska 15-2. The KC-135 provides the core aerial refueling capability for the Air Force, allowing aircraft to linger in airspace during exercises and contingency and humanitarian operations.