Martin Luther King, Jr. reacts in St. Augustine, Fla., after learning that the Senate passed the Civil Rights Bill on June 19, 1964.
King holds his 1964 Nobel Peace Prize medal in Oslo, Norway.
American clergyman and civil rights campaigner King.
In this April 3, 1968 file photo, King makes his last public appearance at the Mason Temple in Memphis, Tenn.
Julian Bond and King casting their ballots to fill Bond's vacant seat in the U.S. House of Representatives in Atlanta, Ga., on Feb. 23, 1966.
King and his wife, Coretta Scott King, sit with three of their four children in their Atlanta, Ga, home, on March 17, 1963. From left are: Martin Luther King III, 5, Dexter Scott, 2, and Yolanda Denise, 7.
Rev. Ralph Abernathy, right, and Bishop Julian Smith, left, flank King, Jr., during a civil rights march in Memphis, Tenn., March 28, 1968.