The first private research atomic reactor opened in Chicago, Illinois, US.
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An F5 max rating tornado smashed through Plainfield, Illinois, killing 29 people, injuring 353, and causing $165 million in damages.
Machine guns were used for the first time in a battle in Omdurman, Sudan, Africa.
John Wayne Gacy was arrested.
Albert Einstein warned against hydrogen bombs on the ''Today with Mrs. Roosevelt" weekly TV show.
The first Dairy Queen restaurant opened in Joliet, Illinois, US.
