Thousands of people are gathering in Washington to remember the Reverend Martin Luther King Jr's landmark "I Have a Dream" civil-rights speech half a century ago.
MLK: US Celebrates 50th Anniversary of Civil Rights March

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Marchers pose for pictures as they commemorate the 50th anniversary of the 1963 March on Washington for Jobs and Freedom at the Lincoln Memorial in Washington, Aug. 24, 2013.

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A marcher holds a sign as she attends the 50th anniversary of the 1963 March on Washington for Jobs and Freedom at the Lincoln Memorial in Washington, Aug. 24, 2013.

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A Ukrainian serviceman gets a haircut at a military camp near the town of Debaltseve in eastern Ukraine.