5 of 54: Former President Jimmy Carter speaks at the Let Freedom Ring ceremony at the Lincoln Memorial Wednesday, Aug. 28, 2013, in Washington, to commemorate the 50th anniversary of the 1963 March on Washington for Jobs and Freedom. It was 50 years ago today when Martin Luther King Jr. delivered his "I Have a Dream" speech from the steps of the memorial. (AP Photo/Carolyn Kaster) ( Photo)

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