# Apollo 11 The first crewed mission to land on the Moon — July 20, 1969. Commander Neil Armstrong and Lunar Module Pilot Buzz Aldrin spent approximately two and a quarter hours on the lunar surface at the Sea of Tranquility while Command Module Pilot Michael Collins orbited overhead. Armstrong's "one small step for man, one giant leap for mankind" became the most quoted sentence of the 20th century. An estimated 600 million people worldwide watched the live television broadcast, the largest audience for any single event in human history at that point. ## The mission Apollo 11 launched on a Saturn V rocket from Kennedy Space Center on July 16, 1969. The lunar module *Eagle* separated from the command module *Columbia* on July 20 and descended toward the surface. During the final minutes of descent, navigation computer alarms (the famous "1202" and "1201" program alarms indicating executive overflow) nearly triggered an abort; mission controllers in Houston determined in real time that the alarms were non-critical and cleared the landing to continue. Armstrong then took semi-manual control when the intended landing site proved to be a boulder field, flying laterally to find clear terrain and landing with approximately 25 seconds of fuel remaining. The astronauts planted a flag, collected 21.5 kg of lunar samples, deployed scientific instruments, and spoke by telephone with President [[Richard Nixon]] in the White House. The total time on the surface was 21 hours 36 minutes; time outside the spacecraft was 2 hours 31 minutes. The crew returned to Earth on July 24. ## KB significance Apollo 11 is the single most frequently cited example of what government-funded science and engineering can achieve — and therefore a recurring reference point in debates about federal spending, industrial policy, and the proper scope of government. The achievement is invoked across the political spectrum: by advocates of public investment (proof that ambitious government programs work), by critics of contemporary dysfunction (why can't we do things like this anymore), and by conspiracy theorists (the [[Moon Landing Hoax]] claims that the footage was faked). The conspiracy angle, while fringe, persists as one of the vault's documented examples of how distrust of institutions generates denial of observable reality. ## See Also - [[Apollo Program]] — the broader program - [[The Moon]] — the destination - [[Moon Landing Hoax]] — the conspiracy theory that denies the achievement - [[NASA]] — the agency