And 2,000 children marched through Montgomery, Alabama Thursday to mark the 50-year anniversary of civil rights pioneer Rosa Parks’ refusal to give up her bus seat to a white man. The children, both black and white, marched arm-in-arm, singing “We Shall Overcome” and other anthems from the civil rights era. Parks’ action led to a city-wide boycott of the Montgomery bus system that lasted over one year. The boycott ended soon after the US Supreme Court ruled the bus segregation unconstitutional in June 1956. Rosa Parks died in October at the age of 92.