US President Barack Obama speaks during a day of service to honor Martin Luther King, Jr, at the Browne Education Campus school in Washington, Jan 16, 2012. [Photo/Agencies]

Joanne Tortorici Luna (R) holds a sign as activists with Occupy Los Angeles unite with African American faith and clergy community members to hold an "Occupy the Dream" rally in honor of American civil rights icon Dr. Martin Luther King outside the Los Angeles Federal Reserve Bank offices on Martin Luther King Day in Los Angeles, California Jan 16, 2012. [Photo/Agencies]