50 years since King's dream

Tens of thousands of Americans have gathered at Washington's National Mall to commemorate 50 years since Martin Luther King made his I Have a Dream speech.

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'King gave a mighty voice to the quiet hopes of millions'

US President Barack Obama has addressed an event to mark the 50th anniversary of Martin Luther King's "I have a dream" speech.

Speaking at the Lincoln Memorial in Washington DC, where the civil rights leader stood fifty years before, he said:

"We rightly and best remember Dr King's soaring oratory that day, how he gave a mighty voice to the quiet hopes of millions".

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