Mr Collins replied: “Landing the LM on the Moon was a two person job. Control of thrusters by one, managing computers by the other. #AskMichaelCollins”
Commander Armstrong and Mr Aldrin landed on the Moon on July 20, 1969, at precisely 8.17pm UTC.
Upon shutting down the Eagle’s engines, Commander Armstrong famously told NASA’s flight control: “Houston, Tranquility Base here. The Eagle has landed.”
Two-and-a-half hours later the astronauts began their preparations for what would be the first Extravehicular Activity (EVA) on the Moon.
Millions of people on both sides of the Iron Curtain watched the moment Commander Armstrong left the Eagle for the first time.