The U.S. Air Force Thunderbirds roar across the Indiana skies during the Grissom Air & Space Expo Sept. 7, 2019. The event drew thousands of spectators, and will continue Sept. 8, 2019 as gates open at 8:30 a.m. with flying starting around 11 a.m. and gates closing at 5 p.m. to the free event. (U.S. Air Force photo/Staff Sgt. Chris Massey)