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 Erickson Brothers submitted the application for the first dial telephone patent.
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.
More than 30 military students were injured in a mass pillow fight leading to a ban of the event in future years.
The ''LZ 127 Graf Zeppelin” returned to Lakehurst, New Jersey, after being the first airship to circumference the earth in one journey.
