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In this Aug. 28, 1963 file photo, the top of the Washington Monument and part of a U.S. flag are reflected in the sunglasses of Austin Clinton Brown, 9, of Gainesville, Ga., as he poses at the Capitol where he joins others in the March on Washington. (AP Photo) ( 1963 and JFK )

This is a view of the March on Washington crowd made from behind the statue of Abraham Lincoln in the Lincoln Memorial in Washington, August 28, 1963. In the distance is the Washington Monument and the Reflecting Pool. (AP Photo) ( March on Washington )

American actor Marlon Brando (1924 - 2004) stands with his arm around poet James Baldwin, surrounded by actors Charlton Heston (L), Harry Belafonte and others gathered at the Lincoln Memorial during the Civil Rights March on Washington, D.C., August 28, 1963. (Photo by Hulton Archive/Getty Images) ( T761245_01 )

Mass of demonstrators leave the Washington Monument, background, for the March on Washington parade to the Lincoln Memorial, Aug. 28, 1963. (AP Photo) ( Civil Rights Protest )

Officers hold back the crowd as a woman is calmed by military police during at the March on Washington for Jobs and Freedom, Washington DC, August 28, 1963. (Photo by Hulton Archive/Getty Images) ( T1030439_06 )

To pass the long morning, young women clap and sing along to a freedom song between speeches at the March on Washington for Jobs and Freedom, Washington DC, August 28, 1963. (Photo by Express Newspapers/L360/Getty Images) ( T1030439_06 )

The clergyman and civil rights leader Martin Luther KIng (C) and other black and white civil right leaders march 28 August 1963 on the Mall in Washington DC during the "March on Washington". King said the march was "the greatest demonstration of freedom in the history of the United States." OFF/AFP/Getty Images ( ARP1946647 )

With the U.S. Capitol in the background, passengers for charter busses walk along a service roadway of the Mall in Washington, August 28, 1963, to find their transportation home after a civil rights demonstration estimated by police at more than 200,000 people. (AP Photo) ( MARCH ON WASHINGTON )

NAACP group from Wilmington, N.C., sing in the street near the Washington monument grounds, Aug. 28, 1963 after their arrival to participate in the March on Washington. (AP Photo) ( Civil Rights Protest )

The clergyman and civil rights leader Martin Luther KIng (3rd from left) and other black and white civil right leaders march 28 August 1963 on the Mall in Washington DC during the "March on Washington". King said the march was "the greatest demonstration of freedom in the history of the United States." AFP/Getty Images ( SAPA980331371970 )

Civil rights march on Washington, D.C. Demonstrators carry signs for equal rights, integrated schools, decent housing, and an end to bias. Aug. 28, 1963. (Warren K. Leffler - Library of Congress Prints and Photographs Division)

Demonstrators marching in the street holding signs during the March on Washington. Aug. 28, 1963. (Marion S. Trikosko - Library of Congress Prints and Photographs Division)

Dr. Martin Luther King, Jr., third from left, marches in a line of men with arms linked during the March on Washington for civil rights on August 28, 1963. (AP Photo) ( MARCH ON WASHINGTON )

Large crowds gather near the Washington Monument to demonstrate for the civil rights movement in Washington, D.C. on August 28, 1963. (AP Photo) ( March on Washington 1963 )

Large crowds gather at the reflecting pool area to demonstration for civil rights in Washington, D.C. on August 28, 1963. (AP Photo) ( March on Washington 1963 )

Large crowds gather at the Lincoln Memorial to demonstrate for civil rights in Washington, Aug. 28, 1963. (AP Photo) ( March On Washington )

Large crowds gather at the Washington Monument to demonstrate for the civil rights movement in Washington, D.C., on August 28, 1963. (AP Photo) ( March on Washington 1963 )

Standing singers of sit-in songs at the New Haven bus terminal on August 28, 1963 just before their departure for Washington, D.C. to take part in the civil rights march. The songbook was furnished by the Congress of Racial Equality, with co-sponsored the Connecticut contingent of over 3,000 with the National Association for the Advancement of Colored People. (AP Photo/Bob Child) ( March on Washington 1963 )

28th August 1963: Over 200,000 people gather around the Lincoln Memorial in Washington DC, where the civil rights March on Washington ended with Martin Luther King's 'I Have A Dream' speech. (Photo by Hulton Archive/Getty Images) ( 96f/14/kocd/3892/4cr13 )

In this Aug. 28, 1963 file photo, the Rev. Dr. Martin Luther King Jr., head of the Southern Christian Leadership Conference, speaks to thousands during his "I Have a Dream" speech in front of the Lincoln Memorial for the March on Washington for Jobs and Freedom in Washington. Actor-singer Sammy Davis Jr. is at bottom right. It has been cited as one of America's essential ideals, its language suggestive of a constitutional amendment on equality: People should "not be judged but he color of their skin but by the content of their character." (AP Photo) ( King Color And Character )

In this Aug. 28, 1963, black-and-white file photo Dr. Martin Luther King Jr., head of the Southern Christian Leadership Conference, addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington. (AP Photo/File) ( CVN The Dream and the Reality )

WASHINGTON, : More than 200,000 civil right militants rather 28 August 1963 on the Mall in Washington DC Washington Monument in background) during the "March on Washington". The civil rights leader Martin Luther King said the march was "the greatest demonstration of freedom in the history of the United States." AFP/AFP/Getty Images ( SAPA980331371980 )

A. Philip Randolph and other civil rights leaders on their way to Congress during the March on Washington. Aug. 28, 1963. (Marion S. Trikosko - Library of Congress Prints and Photographs Division)

In this Aug. 28, 1963 file photo, President Kennedy stands with a group of leaders of the March on Washington at the White House in Washington. Immediately after the march, they discussed civil rights legislation that was finally inching through Congress. The leaders pressed Kennedy to strengthen the legislation; the president listed many obstacles. Some believe Kennedy preferred to wait until after the 1964 election to push the issue. Yet in his public speeches, he spoke more and more about justice for all. From second left are Whitney Young, National Urban League; Dr. Martin Luther King, Christian Leadership Conference; John Lewis, Student Non-violent Coordinating Committee, partially obscured; Rabbi Joachim Prinz, American Jewish Congress; Dr. Eugene P. Donnaly, National Council of Churches; A. Philip Randolph, AFL-CIO vice president; Kennedy; Walter Reuther, United Auto Workers; Vice President Lyndon B. Johnson, partially obscured, and Roy Wilkins, NAACP. (AP Photo) ( JFK Martyr For Blacks )

Leaders of the March on Washington shown with Senator Everett Dirksen, R-Ill., during a visit to the Capitol in Washington on August 28, 1963. From left: Whitney Young, National Urban League; Dr. Martin Luther King, Jr., Southern Christian Leadership Conference; Roy Wilkins, rear, NAACP; Walter Reuther, United Auto Workers president; and John Lewis, Student Non Violent Coordinating Committee. (AP Photo) ( Leaders of March on Washington )

A. Philip Randolph, head of the Brotherhood of Sleeping Car Porters, talks to newsmen at the Capitol after leader of the March on Washington met with congressional leaders, Aug. 28, 1963. At right is Whitney Young of the National Urban League. (AP Photo) ( March On Washington )

Actor Marlon Brando, right, poses with his arm around James Baldwin, author and civil rights leader, in front of the Lincoln statue at the Lincoln Memorial, August 28, 1963, during the March on Washington demonstration ceremonies which followed the mass parade. Posing with them are actors Charlton Heston, left, and Harry Belafonte. (AP Photo, FILE) ( OBIT HESTON )

Sammy Davis, Jr., waving to people as he walks past marshalls at the Lincoln Memorial during the March on Washington. Aug. 28, 1963. (Warren K. Leffler - Library of Congress Prints and Photographs Division)

Group of demonstrators stand around casket at Lincoln Memorial in Washington, August 28, 1963. The group carried placards as they pushed the casket down Constitution Avenue during the March on Washington parade. (AP Photo) ( March on Washington )

Marshalls standing by fence near crowd carrying signs, including "Baptist Ministers Conference of Washington & Vicinity" and "We March for First Class Citizenship Now," during the March on Washington. Aug. 28, 1963. (Warren K. Leffler - Library of Congress Prints and Photographs Division)

View of the huge crowd from the Lincoln Memorial to the Washington Monument, during the March on Washington. Aug. 28, 1963. (Warren K. Leffler - Library of Congress Prints and Photographs Division)

A crowd gathers at the Lincoln Memorial in Washington, Aug. 28, 1963 to hear speakers in ceremonies following the March on Washington parade through the Capitol streets. (AP Photo) ( Civil Rights Protest )

A. Philip Randolph, one of the leaders of the March on Washington demonstration, stands on crowded platform on steps of Lincoln Memorial as he speaks to crowd following the parade which brought the civil rights demonstrators to the memorial area in Washington, August 28, 1963. (AP Photo) ( March on Washington )

Three members of the Senate make up part of the audience at the Lincoln Memorial ceremonies of the civil rights March on Washington in Washington on August 28, 1963. The senators are, from left: Phillip Hart, D-Mich., Wayne Morse, D-Ore., and William Proxmire, D-Wis. (AP Photo) ( March on Washington 1963 )

Jimmy Walker, a marcher in the March On Washington demonstration from Portland, Ore., right, talks to Roy Wilkins, NAACP leader, as they stand in front of the Lincoln statue at the Lincoln Memorial, Aug. 28, 1963. (AP Photo) ( March On Washington )

A crowd gathers near the reflecting pooll in Washington, Aug. 28, 1963, to hear speakers in ceremonies following the March on Washington parade through the Capitol streets. (AP Photo) ( Civil Rights Protest )

Kathleen Johnson of Newark, N.J. gets help from unidentified members of the crowd assembled near the Lincoln Memorial as part of the March On Washington, Aug. 28, 1963. Mrs. Johnson fell into the reflecting pool near the memorial while trying to take a photograph of the area. (AP Photo) ( March On Washington )

Army military policemen line up at Washington Monument grounds for duty during the March on Washington, August 28, 1963. In background are some of the early arrivals for the civil rights demonstration. (AP Photo) ( March on Washington )

George Lincoln Rockwell, leader of the Anti-Negro Anti-Jew American Nazi Party, puffs on a corncob pipe as he poses at the Washington Monument, August 28, 1963, Rockwell and about 40 of his followers showed up without customary uniforms in the monument grounds, center of the March on Washington activities. Police denied a parade permit for Rockwell. (AP Photo) ( George Lincoln Rockwell )

Members of the United Automobile Workers delegation pick up signs on the Ellipse for March on Washington demonstration on August 28, 1963. In background is White House. (AP Photo) ( March on Washington 1963 )

A female demonstrator smiles as she holds protest buttons next to her face at the March on Washington, Washington, DC, August 28, 1963. (Photo by Hulton Archive/Getty Images) ( T471180_14 )