Col. Albert Miller, 22nd Air Refueling Wing commander, observes Senior Airman Andrew Mays, 350th Air Refueling Squadron boom operator, refuel an A-10 Thunderbolt II, June 30, 2017, while flying over Missouri. Air refueling is vital to Air Force operations to allow aircraft to efficiently complete the mission. (U.S. Air Force photo/Airman 1st Class Alan Ricker)