On 20 July 1969, the world watched as Edwin Eugene Aldrin Jr became the second man to set foot on the Moon.
Stepping out of the lunar module after Neil Armstrong, the man better known as Buzz secured his place in history.
As Nasa marks the 40th anniversary of the Apollo 11 mission, the 79-year-old spoke to the BBC's Simon McCoy about his memories of the time, how he felt about playing second fiddle to Armstrong and why he thinks a return to the Moon is a waste of money.
There is a longer version of this interview below.
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