NASA launched the Viking 1 planetary probe toward Mars.
The Viking 1 was the first successful Mars lander in history.
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The ''LZ 127 Graf Zeppelin” returned to Lakehurst, New Jersey, after being the first airship to circumference the earth in one journey.
The Iran-Iraq war ended in a stalemate after nearly eight years of conflict.
Exiled Soviet leader Leon Trotsky was assassinated with an ice axe in Mexico City.
Estonia claimed its independence from USSR.
The Erickson Brothers submitted the application for the first dial telephone patent.
