California’s first freeway, Arroyo Seco Parkway, officially opened to traffic.
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The United States bought 45,000 square miles of land from Mexico.
British forces retaliated against the United States and burned Buffalo, New York, to the ground.
A bombing took place on a trolleybus in Russia.
The Madrid Barajas International Airport was bombed.
Frank Steunenberg, the former governor of Idaho, was assassinated outside his home.