On July 29, 1969 the world looked on as the first human being set foot on another world.
Neil Armstrong stepped down from the Eagle (the lunar lander), followed by Buzz Aldrin.
The Cold War had inspired this superb achievement, which was followed by six more Apollo missions. Originally, there were to be another two, but those were cancelled. Continuing to send men to the Moon was an incredibly expensive way of showing up the Soviet Union, and by then the point had been decisively made.