In March 1965, supporters of black voting rights organized a march from Selma to Montgomery to protest the killing of a demonstrator by a state trooper and to improve voter registration for blacks. On March 7, 1965 the march was stopped, under orders by Gov. George Wallace. That day came to be known as Bloody Sunday because of the brutal way police treated civil rights activists.

Credit: AP

Mrs. S.W. Boynton is aided by two men after she was injured when state police broke up a demonstration march in Selma, Alabama, March 7, 1965. Mrs. Boynton, wife of a real estate and insurance man, has been a leader in civil rights efforts.

Credit: AP

State troopers swing billy clubs to break up a civil rights voting march in Selma, Ala., March 7, 1965. John Lewis, chairman of the Student Nonviolent Coordinating Committee (in the foreground) is being beaten by state troopers.

Credit: AP

Tear gas fumes fill the air as state troopers, ordered by Gov. George Wallace, break up a demonstration march in Selma, Ala., on March 7, 1965, which is known as Bloody Sunday.

Credit: AP

Civil rights demonstrators struggle on the ground as state troopers use violence to break up a march in Selma, Ala., on what is known as Bloody Sunday on March 7, 1965.

Credit: AP

Alabama police troopers on horseback watch as troopers on the ground swing their clubs at demonstrators in Selma, Ala., on what is known as Bloody Sunday on March 7, 1965. Supporters of black voting rights organized a march from Selma to Montgomery to protest the killing of a demonstrator by a state trooper and to improve voter registration for blacks, who are discouraged to register.

Credit: AP

Alabama state troopers wearing masks round up stragglers in a heavy cloud of tear gas after breaking up a civil rights voter registration march in Selma, Ala., March 7, 1965.

Credit: AP

John Lewis, center, of the Student Nonviolent Coordinating Committee, is forced to the ground by a trooper as state troopers break up the demonstration on March 7, 1965, what has become known as "Bloody Sunday" in Selma, Ala.

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