Rev. Martin Luther King Jr., the first defendant called to trial in the racial bus boycott, holds a press conference on March 19, 1956, on the steps of the Montgomery County courthouse where he and 92 others were on trial. They were charged with the violation of the anti-boycott law.
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Dr. Martin Luther King Jr. rides a bus on Dec. 21, 1956, after the Supreme Court's integration order went into effect.
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Martin Luther King speaks in Atlanta in 1960.
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Dr. Martin Luther King Jr. acknowledges the crowd at the Lincoln Memorial for his "I Have a Dream" speech during the March on Washington on Aug. 28, 1963.
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U.S. civil rights leader Martin Luther King Jr. walks with supporters during the March on Washington on August 28, 1963.
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This aerial view shows a half-mile-long line of civil rights demonstrators led by Dr Martin Luther King on March 21, 1965, in Selma, Ala., as they cross the Edmund Pettus bridge.
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Dr. Martin Luther King Jr. locks arms with his aides as he leads a march of several thousands to the court house in Montgomery, Ala., on March 17, 1965.
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President Lyndon Johnson signs the Voting Rights Act as Martin Luther King Jr. and other Civil Rights leaders watch in the Capitol Rotunda on August 6, 1965.
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Civil rights leader Rev. Martin Luther King Jr. is accompanied by famed pediatrician Dr. Benjamin Spock during an anti-Vietnam War demonstration in New York on March 16, 1967.
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Coretta Scott King leads a "March on Memphis" on April 9, 1968, five days after the assassination of her husband, U.S. clergyman and civil rights leader Martin Luther King.
Aurora, Colo., Theater Reopens 6 Months After Shooting