July 20th, 1969. The Sea of Tranquillity.
Neil Armstrong climbs down the ladder of the Lunar Module to make a small step onto the surface of the Moon, watched on television by the people of planet Earth.
It is the pinnacle of a brilliant career that spans combat in Korea, flying rocket-planes to the edge of the atmosphere and facing near-death in space.
But that giant leap also marks his transformation into a global celebrity. For Armstrong, always a reluctant hero, it is a step into another world that he will spend the rest of his life trying to escape from.