Martin Luther King Jr. gives speech on racial inequality and right to vote. Still photos of voter registration campaign in the South. Peaceful protestors in Selma, Alabama, are attacked by police, including some on horseback. Protests in support of Selma are held around the world. Footage of King during the march from Selma to Montgomery. Lyndon Johnson signs the Voting Rights Act. Benjamin Mays, Andrew Young, and Harris Wofford talk about the impact of MLK's work.