Royal Air Force Spitfires and Hurricanes from RAF Coningsby, conduct a Battle of Britain Memorial Flight over Royal Air Force Mildenhall, England, Sept. 18, 2020. The Spitfires and Hurricanes were joined by participating U.S. aircraft as a joint event to celebrate the 73rd Birthday of the United States Air Force.(U.S. Air Force photo by Airman 1st Class Jessi Monte)