A KC-135 Stratotanker refuels F-15

A U.S. Air Force boom operator of a KC-135 Stratotanker assigned to the 28th Expeditionary Air Refueling Squadron at Al Udeid Air Base, Qatar, directs a F-15 Eagle during an aerial refueling mission in support of Operation Inherent Resolve over Iraq, Aug. 15, 2018. Air refueling is a vital component of flying operations, allowing the F-15 to stay airborne longer and support U.S. and coalition forces in the air and on the ground. (U.S. Air Force photo by Senior Airman Xavier Navarro)