Dr. Martin Luther King, Jr. is seen here with Rev. Jesse Jackson, left, just prior to his final public appearance to address striking Memphis sanitation workers on April 4, 1968. King was assassinated later that day outside his motel room. (AP Photo/Charles Kelly)

The Rev. Martin Luther King Jr. stands with other civil rights leaders on the balcony of the Lorraine Motel in Memphis, Tenn., on April 3, 1968, a day before he was assassinated at approximately the same place. From left are Hosea Williams, Jesse Jackson, King, and Ralph Abernathy. The 39-year-old Nobel Laureate was the father of non-violence in the 1960s American civil rights movement. King is honored with a national U.S. holiday celebrated in January. (AP Photo)

Dr. Martin Luther King Jr. makes his last public appearance at the Mason Temple in Memphis, Tenn., on April 3, 1968. The following day King was assassinated on his motel balcony. (AP Photo/Charles Kelly)

Dr. Martin Luther King Jr., discusses his planned poor people's demonstration from the pulpit of the Washington National Cathedral in Washington, D.C., March 31, 1968. (AP Photo)

Dr. Martin Luther King Jr. is seen speaking to newsmen in Newark, N.J., on March 27, 1968. King is saying that he is

Dr. Martin Luther King Jr. (right) who is visiting Mississippi to drum up funds his Poor Peoples March 19, 1968 in Marks, Mississippi USA. King holds a crisp $100 bill and listens to remarks by a Marks, Mississippi, resident , at left, who identified himself as W.B.

This 1954 Chicago police photo shows a man identified as James Earl Ray, 40, who is being sought in connection with the April 4 assassination of Dr. Martin Luther King Jr. in Memphis, Tenn. Ray, an escapee from the Missouri State Penitentiary, was also named Eric Starvo Galt, the name used on arrest warrants by the FBI. (AP Photo)

Dr. Martin Luther King, left, chats with Gerhard Mennen (Soapy) Williams on March 15, 1968 in Detroit. Former Governor of Michigan as two got together following address by King to gathering in Detroit suburb of Grosse Pointe. King spoke at invitation of the Grossw Pointe Human Relations Council and meeting was picked and interrupted while King spoke. (AP Photo/AQ)

Civil rights leader Rev. Dr. Martin Luther King, Jr., president of the Southern Christian Baptist Leadership Conference (SCLC), displays the poster to be used during his Poor People's Campaign this spring and summer, March 4, 1968. King said today in Atlanta that the campaign would begin April 22. (AP Photo/Horace Cort)

The Rev. Martin Luther King Jr. speaks in Selma, Ala., in February 1968. (AP Photo/Charles E. Kelly)

Dr. Martin Luther King, flanked by Hosea Williams, left, and the Rev. Bernard Lafayette, tells an Atlanta news conference on Tuesday morning January 16, 1968 that his planned march on Washington in April to demand jobs and income for the poor will be led by 3,000 non-violent demonstrators. Williams is field director of the project and Rev. Lafayette is coordinator of the march.(AP Photo/Charles Kelly )

Martin Luther King, speaking in 1968, (AP Photo)

Dr. Martin Luther King Jr., is accompanied by his wife Coretta as he arrives at the Atlanta, Ga., airport, on October 30, 1967. The reverend is en route to Birmingham, Ala., to serve in 5-day jail term for a conviction stemming from a 1963 civil rights protest. (AP Photo)

Dr. Martin Luther king confers with his assistant, Andrew Young, at press conference at the overseas press club in New York, May 15, 1967. He said he would lead a

May 02, 1967; Geneva, SWITZERLAND; Reverend MARTIN LUTHER KING JR. (right) at the 'Pacem in Terris' peace conference at Geneva. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine

The Rev. Dr. Martin Luther King Jr. gestures and shouts to his congregation in Ebenezer Baptist Church in Atlanta, Ga. on April 30, 1967 as he urges America to repent and abandon what he called its

Dr. Martin Luther King Jr. appears in deep thought at a press conference in Atlanta, Ga., on April 25, 1967. King announced that he would not be a candidate for the president of the United States. King predicted that black and white students will go to jail rather than fight in Vietnam. (AP Photo)

Dr. Martin Luther King Jr. speaks in front of the United Nations during a peace parade in New York on April 15, 1967. (AP Photo)

Rev. Dr. Martin Luther King Jr., leads a crowd of 125,000 Vietnam War protesters in front of the United Nations in New York on April 15, 1967, as he voices a repeated demand to

Apr 04, 1967; New York, NY, USA; Reverend MARTIN LUTHER KING JR. at a Peace March at United Nation Plaza in Manhattan, New York. (Credit Image: ? KEYSTONE Pictures USA)/ eyevine