Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Hands holding during a civil rights demonstration in Selma or Montgomery, Alabama, March 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

A man holding a sign that reads: One Man, One Vote - Alabama State College, during a civil rights demonstration in Selma or Montgomery, Alabama, March 1965.

Two women amidst crowds of people demonstrating against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Image of a woman at a civil rights demonstration on the streets of Monroe, North Carolina, 1961. She is carrying sign that reads: Taxes Bring Industry Where Negroes Cannot Work.

People holding up flags amidst crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

A nun holding a Bible during a civil rights demonstration in Selma or Montgomery, Alabama, March 1965.

Image of a woman standing on a street corner during a civil rights demonstration in Monroe, North Carolina, 1961. She is holding a sign that reads: No man should be too white or too rich to pay for hi…

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Image of a man at a civil rights demonstration on the streets of Monroe, North Carolina, 1961. He is carrying sign that reads: Who Runs Monroe? The Klan or The Mayor? A police officer is visible behin…

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Man standing in a crowd of people during a civil rights demonstration against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Image shows a man carrying a sign that reads """"""""Civil Rights Plus Full Employment Equals Freedom"""""""" at the March on Washington for Jobs and Freedom in Washington, District of Columbia, Augus…

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.

Crowds of people in front of the Montgomery County Courthouse to demonstrate against police treatment of voter rights demonstrators, Montgomery, Alabama, March 17, 1965.