Knoxville Nationals Trade Show Fast Approaching 6/26/2007- Exhibitor space for the 21st annual Knoxville Nationals Trade Show, to be held during the SuperClean-sponsored Knoxville National Sprint Car Championships, August 8-11, is filling up. Carole Jeschke’s Checkered Connection business of Dayton, Ohio, is the latest to submit a paid application into the offices of the National Sprint Car ...