Events continue this week, marking the 50th anniversary of Martin Luther King Jr.'s famous "I Have a Dream" speech.
This weekend tens of thousands gathered on the National Mall to hear speeches with a strong theme of unfinished business.
"This is not the time for nostalgic commemoration," Martin Luther King III, the oldest son of the civil rights leader, said. "Nor is this the time for self-congratulatory celebration. The task is not done. The journey is not complete. We can and we must do more."
Rep. John Lewis, D-Ga., the only surviving speaker from the 1963 march, rallied against a recent Supreme Court decision against the Voting Rights Act.
"I gave a little blood on that bridge in Selma, Alabama, for the right to vote," he said. "I am not going to stand by and let the Supreme Court take the right to vote away from us. You cannot stand by. You cannot sit down. You've got to stand up. Speak up, speak out, and get in the way."
Speakers also mentioned high unemployment among blacks, which is twice that of white Americans.