Exiled Soviet leader Leon Trotsky was assassinated with an ice axe in Mexico City.
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England was defeated by South Africa, who became top of the world Test cricket rank.
The World Health Organization (WHO) announced that measles cases were at an all-time record high, with 41,000 in the first half of the year alone.
NASA launched the Viking 1 planetary probe toward Mars.
Estonia claimed its independence from USSR.
The Erickson Brothers submitted the application for the first dial telephone patent.
