Complex sentence: There was a level playing field in the 1956 Bendix run, as all six aviators in the competition were experienced Air Force fighter pilots riding the same mount, the USAF's hottest and newest fighter, the F-100 Super Sabre.
Split into simpler sentences: There was a level playing field in the 1956 Bendix run, as all six aviators in the competition were experienced Air Force fighter pilots. The aviators also rode the same mount, the USAF's hottest and newest fighter, the F-100 Super Sabre.