On Aug. 28, 1963, Martin Luther King, Jr. addressed the crowd gathered during the March on Washington, delivering his "I Have a Dream" speech. RNS file photo

Quiz: How well do you know Martin Luther King's 'I Have a Dream' speech?

Wednesday marks the 50th anniversary of the March on Washington and Martin Luther King Jr.'s famous "I Have a Dream" speech. Can you spot some of the biblical and historical references in King's speech? Take the quiz to find out.