Photos: March on Washington 2013: Let Freedom Ring
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President Barack Obama, former President Jimmy Cater, first lady Michelle Obama and former President Bill Clinton wave at the end of the Let Freedom Ring ceremony at the Lincoln Memorial in Washington, Wednesday, Aug. 28, 2013, 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)