U.S. Air Force Col. Christopher Amrhein, 100th Air Refueling Wing commander, briefs Air Force Chief of Staff Gen. David L. Goldfein as he arrives at RAF Mildenhall, England, Dec. 26, 2018. Goldfein visited RAF Mildenhall after traveling throughout the U.S. Central Command area of responsibility with Chief Master Sgt. of the Air Force Kaleth O. Wright to thank Airmen for their service in defense of America. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)