Apollo IV: First flight of Von Braun’s Saturn V (SA-501); this was the success of the “all-up” approach, that is, testing several concepts all at the same time and not one at a time. This concept was deeply contrary to von Braun’s methodical way of working and in fact had been pushed instead by George E. Mueller who had just taken office as Director of Manned Space Flight at NASA. Mueller knew well that there was no time to do everything in the right order: the Soviets were looming.
