On August 19, 1958, Clara Luper and thirteen Black youth walked into Katz Drug Store in Oklahoma City and sat down at the lunch counter. When they tried to order, they were denied service. As they sat in silence, refusing to leave, the surrounding white customers unleashed a torrent of threats and racial slurs. This first organized sit-in in Oklahoma—almost two years before the more famous sit-ins in Greensboro, North Carolina—sparked other demonstrations in Oklahoma and other states. ...