sep 6, 1903 - President William H. McKinley is shot at the Pan-American Exposition in Buffalo

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It happened when he was shaking hands with fair visitors, following his speech at the event on President's Day the day before. Anarchist Leon Czolgosz is arrested for the crime. On September 14, Vice President Theodore Roosevelt is inaugurated as President upon the death of William McKinley from gunshot wounds sustained the week earlier.

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