 The Titan II launch vehicle used for the Gemini program had been notoriously rough-riding, and technicians promised the astronauts that the Saturn V, which was designed for the Apollo program rather than adapted from a missile, would have a much smoother ride. Lovell and Borman, both Gemini veterans, found this promise did not disappoint. During liftoff, they reported feeling nothing but a dull, muted rumble in the distance.
