Theodore Roosevelt was sworn in as the 26th President of the United States on September 14, 1901, hours after President William McKinley died from gunshot wounds inflicted eight days earlier by anarchist Leon Czolgosz at the Pan-American Exposition in Buffalo, New York.
McKinley had been shaking hands with the public when Czolgosz approached with a concealed revolver wrapped in a handkerchief and fired twice at close range. Roosevelt, then just 42, became the youngest man to assume the presidency, taking the oath in a private Buffalo residence rather than the traditional halls of power in Washington.
