One migrant’s son, Emmett Till, on a visit from Chicago to Mississippi in 1955, was killed for breaking protocol in some way that will probably never be known for sure, except that everyone agreed it involved something he had said to a white woman, which only served to remind those who left of the rightness of their decision and those who stayed how foolhardy it could be to forget for a moment where you were when you crossed into the very different country of the South.
