As the Saturn V moved off the pad, the sound finally reached across the marsh and slammed into the viewing area. It came first through the ground, tremors that shook the viewing stand and rattled its corrugated iron roof. Then came the noise, 120 decibels of it, in staccato bursts. People who were there would recall it not as a sound, but as a physical force. In the C.B.S. broadcast booth, the plate-glass window began to shake so violently that Walter Cronkite had to hold it in place with his hands as he tried to continue his commentary.
