"That's one small step for man, one giant leap for mankind."
Words spoken on this date 45 years ago by the late Neil Armstrong -- the first human to set foot on the moon.
NASA spaceflight Apollo 11 took Armstrong and fellow American astronauts Buzz Aldrin and Michael Collins on the mission.
The landing was broadcast live on television around the world.
Brian O'Brien is a Professor or Physics at the University of Western Australia.
In 1969 he was working with NASA, leading experiments into the dust brought back from the moon's surface.
He is speaking with Peggy Giakoumelos about his memories of the historic endeavour.
(Click on the audio tab above to hear the full interview)
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