1 / 20 photos Martin Luther King Jr. Photo Gallery

Reverend Martin Luther King, Jr. speaks with people after delivering a sermon on May 13, 1956 in Montgomery, Alabama. (Photo by Michael Ochs Archives/Getty Images)

Martin Luther King, Jr. spending time with his son, Martin III, and daughter Yolanda.

Reverend Martin Luther King, Jr. is shown at a 1963 news conference here, in which he said that negotiations to end Birmingham's racial strife were still underway.

King speaks to a packed crowd at Fisk University in Nashville, Tennessee, in 1964, urging them to continue their demonstrations. Nashville saw seven days of racial demonstrations that began April 27, 1963. King arrived at the airport and told newsmen that he had not been asked to participate in the demonstrations.

Reverend Martin Luther King, Jr. waves to participants in the Civil Rights Movement's March on Washington from the Lincoln Memorial. It was from this spot that he delivered his famous "I Have a Dream" speech on August 28, 1963.

President Lyndon B. Johnson meets with Civil Rights leaders Martin Luther King, Jr., Whitney Young, James Farmer January 18, 1964.

Martin Luther King, Jr. meets his parishioners at Ebenezer Baptist Church after Sunday services in 1964. His father, the main pastor of the church, stands behind him.

Martin Luther King, Jr. serves pieces of chicken to his young sons Marty and Dexter at this 1964 Sunday dinner.

King and his wife, Coretta, march with other civil rights activists through a neighborhood in Selma in 1965.

Martin Luther King, Jr. leading the 1965 march from Selma to Montgomery to protest lack of voting rights for African-Americans. Beside King is John Lewis, Reverend Jesse Douglas, James Forman and Ralph Abernathy.

King tries a difficult behind-the-back shot while using his "best stick" in a pool match with Chicago civil rights leader Al Raby, while on an anti-slum campaign in 1966.

Martin Luther King, Jr. speaks to a crowd at the 1966 March Against Fear rally, on the steps of the Mississippi State Capitol. The march, which began in Memphis, Tennessee, is led by James Meredith, the first African-American student at the University of Mississippi.

King leads a group of African-American children to their newly integrated school in Grenada, Mississippi, escorted by folk singer Joan Baez and two aides.

King nd his wife march together along a rural Mississippi road with the March Against Fear in 1966.

Civil rights leader Martin Luther King, Jr. sits in a jail cell at the Jefferson County Courthouse in Birmingham, Alabama.

Civil rights leader Rev. Martin Luther King, Jr., (C) is accompanied by famed pediatrician Dr. Benjamin Spock (2nd-L), Father Frederick Reed (3rd-R) and union leader Cleveland Robinson (2nd-R) 16 March, 1967, during an anti-Vietnam War demonstration in New York.  (Photo:AFP/Getty Images)

As he walks through O'Hare Airport, American Civil Righter leader and minister Jesse Jackson holds a copy of the Daily Defender newspaper, which features the headline 'King Murdered!,' Chicago, Illinois, April 5, 1968. (Photo by Robert Abbott Sengstacke/Getty Images)

Martin Luther King Jr.'s casket being carried through streets on a mule-drawn wagon in Atlanta, April 9th, 1968.

King's family mourns the leader's death at his 1968 funeral in Atlanta, Georgia.

Street signs mark the intersection of Rosa Parks Boulevard and Martin Luther King, Jr. Boulevard in Detroit, Michigan. Parks sparked a 381-day boycott of the bus system when she refused to give up her bus seat to a white man in Alabama in 1955. The boycott was led by a little-known Baptist minister at the time, Reverend Martin Luther King, Jr. who earned the Nobel Peace Prize for his work.