U.S. Secretary of Defense Dr. Mark T. Esper listens to mission briefings during a visit to RAF Mildenhall, England, June 25, 2020. Esper met with 100th Air Refueling Wing, 352nd Special Operations Wing, Royal Air Force and tenant unit leadership to learn of the various mission sets and discuss the base’s role in operations in both the European and African theaters. (U.S. Air Force photo by Senior Airman Brandon Esau)