Complex sentence: In addition to well-known celebrities of the time, many other distinguished Americans made appearances including Astronaut Buzz Aldrin, war hero, General John K. Singlaub and the well known author and American historian Dr. David Barton.
Split into simpler sentences: In addition to well-known celebrities of the time, many other distinguished Americans made guest appearances. Included were Astronaut Buzz Aldrin, war hero, General John K. Singlaub and the well known author and American historian Dr. David Barton.