CF-18 Hornets from the Royal Canadian Air Force’s 401st Tactical Fighter Squadron approach the show box over the Ohio River during the Thunder Over Louisville airshow in Louisville, Ky., April 13, 2019. The Kentucky Air National Guard once again served as the base of operations for military aircraft participating in the annual event, which has grown to become one of the largest single-day air shows in North America. (U.S. Air National Guard photo by Dale Greer)