Martin Luther King Jr.

Fifty years ago Dr. Martin Luther King Jr. gave the most famous speech on civil rights in American history. Wednesday on the National Mall in Washington, tens of thousands celebrated that speech, and that dream.

FOX News Radio's Rich Johnson reports from the Lincoln Memorial:

March on Washington Obama

From Oprah Winfrey to Jamie Foxx to Bill Russell to civil rights icons Julian Bond, Andrew Young and John Lewis. Speakers talked about the magic of that day 50 years ago and the legacy of those who marched.

Barack Obama

(President Obama) "Because they marched, city councils changed, and state legislatures changed, and Congress changed, and yes eventually the White House changed."

Armanda Hawkins, Vera Moore, Betty Waller Gray

But President Obama also hammered away at the dream that has yet to be, what he called our great unfinished business.

At the Lincoln Memorial, Rich Johnson, FOX News Radio.

WATCH a highlight from Dr. Martin Luther King Jr.'s "I Have A Dream" speech:

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CLICK HERE to READ a transcript of Dr. Martin Luther King Jr.'s "I Have A Dream" speech.

READ a statement by President George W. Bush on the 50th Anniversary of the March on Washington:

"Laura and I are proud to join our fellow Americans in commemorating the 50th Anniversary of the March on Washington and Martin Luther King, Jr.'s "I Have A Dream" speech.

When Reverend King came to Washington, D.C., in the summer of 1963, his purpose was to hold our Nation to the standards spelled out in the Declaration of Independence.  He called all of us to live up to that document's fundamental promise and the underpinning of our founding - that all of us are created equal and endowed by our Creator with certain unalienable rights.  From the steps of the Lincoln Memorial, with thousands gathered around him, Dr. King looked out over the American capital and uttered simple, powerful words that changed the hearts of millions.  The dream he had spread a message of hope, justice, and brotherhood that took hold in the hearts of men and women around the world.

Our country has come a long way since that bright afternoon 50 years ago; yet our journey to justice is not complete.  Just to the East of the Lincoln Memorial, where President Obama will speak on Wednesday, stands the Martin Luther King, Jr. Memorial.  There on the National Mall our President, whose story reflects the promise of America, will help us honor the man who inspired millions to redeem that promise.

Dr. King was on this Earth just 39 years, but the ideals that guided his life of conscience and purpose are eternal.  Honoring him requires the commitment of every one of us.  There's still a need for every American to help hasten the day when Dr. King's vision is made real in every community - when what truly matters is not the color of a person's skin, but the content of their character.

Laura and I thank the King family and all who work to carry on the legacy of a great man and the promise of a great Nation.  May we continue to march toward the day when the dignity and humanity of every person is respected.  And may God continue to bless America."

VIEW PHOTOS from the March on Washington (Photo Courtesy: AP):