A KC-135 Stratotanker takes off from the flightline at Al Udeid Air Base, Qatar, Feb. 18, 2015. The KC-135 fleet at Al Udeid AB flew more than 14,700 sorties in 2015 accumulating 103,419 combat hours in support of Operations Inherent Resolve and Freedom’s Sentinel. (U.S. Air Force photo/Senior Airman Kia Atkins)