◆ On this day

July 20

3 sourced moments from July 20 in history: Why Stauffenberg's July 1944 bomb failed to kill Hitler; Apollo 11 landed on the Moon on July 20, 1969; and Viking 1 made the first fully successful Mars landing (1976).

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3 things happened on July 20

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1976 Space · Space Exploration

Viking 1 made the first fully successful Mars landing

NASA's Viking 1 touched down on Chryse Planitia on July 20, 1976, five years after a Soviet lander fell silent within two minutes, and worked for six years.

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1969 History · Modern

Apollo 11 landed on the Moon on July 20, 1969

Armstrong and Aldrin spent almost a day on the Moon but walked outside for just two and a half hours. One thing they left still works.

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1944 History · War & Conflict

Why Stauffenberg's July 1944 bomb failed to kill Hitler

Only one of two bombs was armed and the briefcase was moved behind a table support. Then the Valkyrie coup lost three crucial hours.

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