US First Lady Michelle Obama speaks at a screening of "The Powerbroker: Whitney Young's Fight for Civil Rights," at th Eisenhower Executive Office Building in Washington, DC, on August 27, 2013. The screening is a part of celebrations commemorating the 50th anniversary on the March on Washington, the civil rights watershed where Martin Luther King Jr famously declared: "I have a dream." The March on Washington is best remembered for King's stirring vision of a United States free of inequality and prejudice, telecast live to a nation undergoing a phenomenal decade of soul-searching, crisis and change. AFP Photo/Jewel Samad AFP Photo/Jewel Samad