Walking in the steps of MLK

Demonstrators march towards the Martin Luther King Jr. Memorial during the 50th anniversary commemoration of the 1963 March on Washington Saturday, Aug. 24, 2013, in Washington.
AP Photo/Jose Luis Magana

(CBS News) The stirring sounds of the civil rights movement came alive once again in the nation's capital this weekend, as tens of thousands of people retraced the steps of 1963's March on Washington.

Edith Lee Payne says the anniversary is a reminder that there is more work to be done. "We have not come as far as we need to be," she told CBS News correspondent Jeff Pegues.

She was 12 years old the first time she marched, growing up in a nation where "equality and justice for all" was something that did not apply to black Americans.

But Dr. Martin Luther King Jr's speech that day spoke of a dream the civil rights leader hoped would come true.

"I have a dream that one day this nation will rise up, live out the true meaning of its creed: 'We hold these truths to be self-evident, that all men are created equal.' "

In a new poll -- 50 years after Dr. King delivered his historic "I have a dream" speech -- 55 percent of African-Americans say civil rights have "somewhat improved" in their lifetime. Another 25 percent say rights have "greatly improved."

CBSNews.com special section: MLK's dream: 50 years later

On Saturday the crowds that packed around the reflecting pool celebrated those words and the progress that has been made.

But Martin Luther King III warned against complacency.

"Regressive stand-your-ground laws must be repealed," he told the crowd. "Federal anti-profiling legislation much be enacted."

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But the most pointed and perhaps controversial comments came from the Reverend Al Sharpton, who scolded a younger generation that glorifies guns and violence:

"Don't you ever think that men like Medgar Evers died to give you the right to be a hoodlum," he said. "Don't disrespect your women. No matter what they promise you, make it clear that you know that Rosa Parks wasn't no ho, and Fannie Lou Hamer wasn't no bitch."

On Wednesday former Presidents Jimmy Carter and Bill Clinton will be among the speakers. But President Obama headlines the commemoration, delivering a speech where, 50 years ago, Dr. King stood.