U.S. President Barack Obama and his family receive a tour at the dedication ceremony of the Martin Luther King, Jr. Memorial in West Potomac Park in Washington, October 16, 2011. From L-R are: First lady Michelle Obama, CEO of the Martin Luther King, Jr. National Memorial Foundation Harry E. Johnson, Martin Luther King III, Arndrea King, Obama, Malia Obama and Mariam Robinson. REUTERS/Larry Downing (UNITED STATES – Tags: POLITICS)