On September 15, 1963, four Ku Klux Klan members planted dynamite under the steps of the 16th Street Baptist Church in Birmingham, Alabama. Martin Luther King, Jr. called it “one of the most vicious and tragic crimes ever perpetrated against humanity.” The first prosecution didn’t occur until the next decade. The next two until the next century. One of the men was never prosecuted. None received the punishment they deserved, but a more fitting punishment, perhaps, is that their diabolical act helped galvanize the passage of the Civil Rights Act of 1964.