On the morning of September 15, 1963, a bomb exploded outside the Sixteenth Street Baptist Church in Birmingham, Alabama, killing four young girls.
With many key witnesses and two suspects already dead, there seemed little hope of bringing anyone else to justice..
Thirty-two years later, stymied by a code of silence and an imperfect and often racist legal system, only one person, Robert "Dynamite Bob" Chambliss, had been convicted in the murders, though a wider conspiracy was suspected.
On the morning of September 15, 1963, a bomb exploded outside the Sixteenth Street Baptist Church in Birmingham, Alabama, killing four young girls