Politics

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Andrew Young, who was U.S. ambassador to the United Nations during the Carter administration, speaks during the "I Have a Dream" gospel brunch at the Willard InterContinental hotel in Washington on Sunday, Aug. 25, 2013. (AP Photo/Jose Luis Magana)

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U.N. Secretary General Ban Ki-moon, right, bows to the guests prior to delivering a speech marking the 100th anniversary of the U.N. Peace Palace in The Hague, Netherlands, Wednesday Aug. 28, 2013. (AP Photo/Peter Dejong)

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On Aug. 28, 1963, the Rev. Martin Luther King Jr. and thousands of other civil rights activists marched along Constitution Avenue from the Washington Monument to the Lincoln Memorial, where King delivered his landmark "I Have a Dream" speech. (Associated Press Photographs)

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Although the Rev. Martin Luther King Jr.'s "I Have a Dream" speech will be at the center of Wednesday's rally, speakers will be challenged to use his ideals to address the problems of today. (Associated Press)

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In, 1963, King was the leader of the Southern Christian Leadership Conference. The Rev. C.T. Vivian, the current president, says, "I like the idea of 50 years. It gives the nation a chance to review the progress or lack of it."

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The spot where the Rev. Martin Luther King Jr.' delivered his 'I Have a Dream' speech in 1963 is marked at the Lincoln Memorial. Fifty years later, the nation's first black president will stand in the same place as the most high-profile example of the racial progress King espoused, delivering remarks at a nationwide commemoration of the 1963 demonstration for economic justice and racial equality. (Associated Press)