U.S. Air Force Chief Master Sgt. Deborah McGuane, 336th Air Refueling Squadron KC-135 Stratotanker boom operator, conducts aerial refueling training with a KC-10 from Travis Air Force Base, June 26, 2018 over California. Travis Airmen conduct training missions to stay current and be prepared for future mobility operations. (U.S. Air Force photo by Master Sgt. Joey Swafford)