The day after President McKinley spoke to a vast crowd at the Pan American Exposition, Leon Czolgosz hurried to the Temple of Music, with his .32 caliber revolver carefully hidden in his pocket beneath his handkerchief. He drew a breath of relief when he saw the long line of citizens waiting for the doors to open so they could have their turn to shake a U.S. President’s hand. His only concern was that something would have happened to detain McKinley and he would not have his chance. Czolgosz took his place at the end of the line.
McKinley only had ten minutes allotted for greeting the public, and the line moved forward swiftly. While they waited, they could listen to William Gomph, the exposition’s organist, playing Robert Schumann’s Träumerei from Kinderscenen on the Temple’s famed organ.