A joint color guard from the Kentucky Army and Air National Guard presents the colors to kick off the Thunder Over Louisville air show in downtown Louisville, Ky., April 13, 2019, as the Kentucky Guard's 138th Field Artillery Brigade stands buy to add cannon fire to the Star Spangled Banner. The annual event, which featured more than two dozen military aircraft, has grown to become one of the largest single-day air shows in North America. (U.S. Air National Guard photo by Dale Greer)