Presidents Walking at the Lincoln Memorial

President Barack Obama, First Lady Michelle Obama, and former Presidents Bill Clinton and Jimmy Carter walk past the statue of President Lincoln to participate in the ceremony on the 50th anniversary of the historic March on Washington for Jobs and Freedom and Dr. Martin Luther King, Jr.'s "I Have a Dream" speech, at the Lincoln Memorial in Washington, D.C., Aug. 28, 2013. (Official White House Photo by Chuck Kennedy)

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