Leon Frank Czolgosz (Polish form: Czołgosz, Polish pronunciation: [ˈt ʂɔwɡɔʂ]; May 5 1873 – October 29, 1901; also used surname "Nieman" and variations thereof ) was an American former steel worker, of Polish descent, responsible for the assassination of U.S. President William McKinley.
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Leon Frank Czolgosz (Polish form: Czołgosz, Polish pronunciation: [ˈt ʂɔwɡɔʂ]; May 5 1873 – October 29, 1901; also used surname "Nieman" and variations thereof ) was an American former steel worker, of Polish descent, responsible for the assassination of U.S. President William McKinley.