Twelve people, including a 3-year-old child, were shot at a Chicago park in the Back of the Yards neighborhood Thursday night, authorities said. Ten adults and the 3-year-old were transported by Fire Department ambulances after in the attack in the 1800 block of West 51st Street in the Back of the Yards neighborhood, said Fire Department Deputy District Chief James Mungovan. A twelfth victim was believed to have driven himself to Little Company of Mary Hospital in Evergreen Park, a source said, citing preliminary information. …