Jamestown residents took time to mourn a slain president in September 125 years ago. On Sept. 6, 1901, President William McKinley was shot by an anarchist named Leon Czolgosz at the Pan-American Exposition at Buffalo, New York. Czolgosz fired two shots at close range. One shot grazed the president, causing a minor wound. The second shot damaged the president’s stomach and other internal organs. The crowd around the incident didn’t wait for law e…