Thunder Over Louisville air show marks 70th anniversary of U.S. Air Force, Kentucky Air Guard
                Pilot Billy Werth flies an aerial demonstration in his Pitts S-2C aircraft during the Thunder Over Louisville air show in Louisville, Ky., April 22, 2017. The event, which features more than a dozen aircraft, has grown to become the largest annual single-day air show in America. (U.S. Air National Guard photo by Lt. Col. Dale Greer)
                
                    
                        PHOTO BY:
                        Lt. Col. Dale Greer
                    
                    
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                        170422-Z-VT419-429.JPG
                    
                    
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