Liftoff of Apollo 4

The first uncrewed test flight of the Saturn V rocket lifts off from Kennedy Space Center on Apollo 4, validating the 'all-up' testing approach that flew every stage of the massive rocket together on its very first launch. The flight was a resounding success, and its shockwave was so powerful that broadcaster Walter Cronkite, watching from several miles away, was famously heard telling his crew the ceiling tiles in the broadcast booth were shaking loose.