WASHINGTON, DC – OCTOBER 16: (AFP OUT) U.S. President Barack Obama listens to Harry Johnson, president and CEO of the MLK Jr National Memorial Project Fund, as he tours the grounds with his family prior to the dedication of the Martin Luther King, Jr Memorial on the National Mall October 16, 2011 in Washington, DC. The ceremony for the slain civil rights leader had been postponed earlier in the summer because of Hurricane Irene. (Photo by Mike Theiler-Pool/Getty Images)