Answer
William McKinley, the 25th President of the United States, fell victim to an assassination carried out by Leon Czolgosz. This tragic event occurred during the Pan-American Exposition in Buffalo, New York on September 6, 1901. Czolgosz, an anarchist, shot McKinley twice while he was attending a public reception. Despite efforts to save his life, President McKinley succumbed to his injuries on September 14.