Last updated: 21 july, 2009 - 11:59 GMT
Moon landing: exactly 40 years on
Neil Armstrong first stepped onto the surface of the moon at 0256 and 15 seconds GMT on July 21 1969.
Reliving the moment, the World Today's Pascale Harter and Mark Whitaker were joined by scientist Dr Chris Riley to listen to the audio that was being broadcast by the astronauts on the moon exactly 40 years before.
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First broadcast 21 July 2009
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