Stevie Wonder released “That Girl,” which went on to win Billboard Song of the Year.
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A bombing took place on a trolleybus in Russia.
The founding of the Soviet Union was announced.
Frank Steunenberg, the former governor of Idaho, was assassinated outside his home.
Astronomer Edwin Hubble formally announced the existence of other galactic systems at a meeting of the American Astronomical Society.
Johannes Brahms Symphony No. 2 in D Major premiered in Vienna.
