On this day: July 20

POSTED: 07:48 AM PDT Jul 19, 2012    UPDATED: 11:00 PM PDT Jul 19, 2012 

An ancient king is born, the first Ford rolls off the line, the Special Olympics are born, man lands on the moon and a home run king belts his last, all on this day.

OTD July 20 - Viking I
26 / 40
NASA

1976: The American Viking 1 lander becomes the first spacecraft to successfully land on Mars.

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