** FILE ** Coretta Scott King, widow of the Rev. Martin Luther King Jr., embraces singer Stevie Wonder during a celebration on the steps of the U.S. Capitol Building in Washington, D.C., Nov. 3, 1983, after U.S. President Ronald Reagan signed a bill making the civil rights leader's birthday, Jan. 15, a national holiday. Wonder received a Lifetime Achievement Award from the National Civil Rights Museum, Tuesday, Oct. 17, 2006. (AP Photo/Ron Edmonds)

Three young demonstrators hold up signs in memory of Dr. Martin Luther King, Jr. in front of Mariner's Temple Baptist Church in New York, Jan. 15, 1975. The demonstration followed memorial services held for the slain civil rights leader, who would have been 46 years old today. (AP Photo)

An unidentified Atlanta high school student places flowers at the tomb of Dr. Martin Luther King Jr., April 3, 1969, Atlanta, Ga. King was assassinated April 4, 1968, in Memphis, Tenn. His Death is to be mourned across the country in mass marches and numerous memorial services. (AP Photo/BJ)

Civil rights leader Rev. Ralph Abernathy discusses the second day of the Poor People's Campaign in Washington from the steps of the Capitol, April 30, 1968. At left is A.D. King, brother of the late Dr. Martin Luther King, Jr., who was assassinated April 4. (AP Photo)

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Successor to Reverend Martin Luther King Jr., Dr. RALPH ABERNATHY arrives for the funeral service of Dr. King, in Ebenezer Baptist church in Atlanta, Georgia. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Anguished mourners line the route as Reverend Martin Luther King Jr.'s body is taken to the open air campus service held at the Moorhouse College in Atlanta, Georgia. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Anguished mourners line the route as Reverend Martin Luther King Jr.'s body is taken to the open air campus service held at the Moorhouse College in Atlanta, Georgia. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Funeral service for Reverend Martin Luther King at the Ebenezer Baptist Church, Atlanta. Mrs. CORETTA SCOTT KING and the children YOLANDA, DEXTER and BERNICE; on the other side of the coffin U.S. Vice-President HUBERT HUMPHREY and THURGOOD MARSHALL (wearing glasses). (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Anguished mourners line the route as Reverend Martin Luther King Jr.'s body is taken to the open air campus service held at the Moorhouse College in Atlanta, Georgia. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; Anguished mourners line the route as Reverend Martin Luther King Jr.'s body is taken to the open air campus service held at the Moorhouse College in Atlanta, Georgia. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Apr 09, 1968; Atlanta, GA, USA; MARTIN LUTHER KING JR.'s funeral in Atlanta. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

Coretta Scott King, wearing hat and gloves, and her four children view the body of her husband, slain civil rights activist leader Dr. Martin Luther King Jr., in Atlanta, Ga., on April 7, 1968. The children are, from left, Yolanda, 12, Bernice, 5, Martin III, 11, and Dexter 7. Dr. King was assassinated in Memphis, Tenn. on April 4. Other members in the photograph are not identified. (AP Photo)

National Guardsmen patrol the streets following rioting and violence that ensued after the news of the assassination of Dr. Martin Luther King, Jr., in Chicago, April 6, 1968. (AP Photo)

Civil rights leader Dr. Martin Luther King, victim of an assassin's bullet in Memphis Thursday Apr. 3, 1968, presented this study in that city earlier this week. Scene was Wednesday as king and his aides were being served papers by U.S. Marshal. A federal restraining order prohibited King from leading any mass marches. Violence erupted in Memphis last week when King headed a march in the city. (AP Photo)

The casket bearing the body of slain civil rights leader Dr. Martin Luther King Jr., is taken up a loading ramp and placed aboard an airliner to his hometown Atlanta, Ga., on April 5, 1968, at the airport of Memphis, Tennessee. The Rev. Ralph Abernathy, King's closest associate and named to replace Dr. King as head of the SCLC, stands in the doorway of the plane. (AP Photo)