 Luke Helder

Lucas John "Luke" Helder (born May 5, 1981) is a former University of Wisconsin–Stout student from Pine Island, Minnesota, who earned notoriety as the Midwest Pipe Bomber in May 2002.While attending the University of Wisconsin–Stout, Helder planned to plant pipe bombs in mailboxes across the United States to create a smiley face shape on the United States map.