Mrs Rosa Parks, a Negro seamstress, being fingerprinted after her refusal to move to the back of a bus to accommodate a white passenger touched off the bus boycott, Montgomery, Alabama, 1956. (Photo by Underwood Archives/Getty Images)

Mrs Rosa Parks, a Negro seamstress, being fingerprinted after her refusal to move to the back of a bus to accommodate a white passenger touched off the bus boycott, Montgomery, Alabama, 1956. (Photo by Underwood Archives/Getty Images)