Article Photos: More than 300 sites ring bells for MLK speech 8/26

Oprah Winfrey speaks at the Let Freedom Ring ceremony at the Lincoln Memorial in Washington, Wednesday, Aug. 28, 2013, to commemorate the 50th anniversary of the 1963 March on Washington for Jobs and Freedom. It was 50 years ago today when Martin Luther King Jr. delivered his "I Have a Dream" speech from the steps of the memorial. (AP Photo/Carolyn Kaster)