A U.S. Air Force KC-10 Extender taxis past a U.S. Air Force F-15 Strike Eagle at an undisclosed location in Southwest Asia, Oct. 21, 2016. The KC-10s are providing air refueling support to various coaliton airframes working to liberate the city of Mosul, Iraq. (U.S. Air Force photo by Senior Airman Tyler Woodward)