Paul Galvin and his brother Joseph founded Motorola as the “Galvin Manufacturing Co.” in Chicago, Illinois.
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An F5 max rating tornado smashed through Plainfield, Illinois, killing 29 people, injuring 353, and causing $165 million in damages.
The first Mormon Pioneers left their homes in Nauvoo, Illinois, and began the long trek to the Salt Lake Valley.
The Cherry Mine disaster in Illinois killed 259 miners in a coal mine fire.
John Wayne Gacy was arrested.
The first Dairy Queen restaurant opened in Joliet, Illinois, US.
