Martin Luther King , Jr.

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Clouds gather over the Martin Luther King, Jr. Memorial in Washington, Friday, Aug. 26, 2011. The memorial's dedication ceremony has been postponed due to the impending arrival of Hurrican Irene. (AP Photo/Cliff Owen)

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Rev. Bernice King, daughter of the legendary civil rights leader Martin Luther King, Jr., addresses an impromptu gathering at her father's memorial in Washington, Friday August 26, 2011. The memorial's dedication has been postponed due to Hurricane Irene's impending arrival. (AP Photo/Cliff Owen)

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A worker packs-up a portion of the 30,000 chairs at the Martin Luther King, Jr. Memorial in Washington, Friday, Aug. 26, 2011. The memorial's dedication ceremony has been postponed due to the impending arrival of Hurrican Irene. (AP Photo/Cliff Owen)

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Unveiling: The Martin Luther King, Jr. Memorial - Sunday

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President and CEO of the Martin Luther King, Jr. National Memorial Project Foundation Harry E. Johnson gestures while giving D.C. Mayor Vincent Gray and Del. Eleanor Holmes Norton a tour at the site of the new Martin Luther King Jr. National Memorial, in Washington, D.C., Wednesday, Aug. 10, 2011. (Drew Angerer/The Washington Times)