Public Safety Director Wilson Baker, front center, stands with a line of uniformed city police as they block the way of demonstrators behind them who are attempting to march to the courthouse to demand voter registration rights for blacks in Selma, Ala. on March 13, 1965. Demonstrators on the street tried to push past police lines and when unsuccessful this group, mostly ministers, tried to march off in another direction where they were stopped again. (AP Photo)