NATA AT Expo Attendees of the 73rd NATA Symposia & AT Expo packed the Pennsylvania Convention Center in Philadelphia after a two-year in-person hiatus. Hall of Fame inductees spoke during their induction ceremonies at the 73rd NATA Symposia & AT Expo in Philadelphia. Show exhibitors demonstrate their products at the 73rd NATA Symposia & AT Expo at the Pennsylvania Convention Center in Philadelphia. training-conditioning.com | 9http://www.training-conditioning.com