California’s first freeway, Arroyo Seco Parkway, officially opened to traffic.
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Astronomer Edwin Hubble formally announced the existence of other galactic systems at a meeting of the American Astronomical Society.
Frank Sinatra first recorded 'My Way,' with lyrics written by Paul Anka based on the French song 'Comme d'habitude.'
Tropical Storm Zeta formed in the open Atlantic Ocean.
Frank Steunenberg, the former governor of Idaho, was assassinated outside his home.
The United States bought 45,000 square miles of land from Mexico.
