Celebrities who joined March on Washington

POSTED: 03:57 PM PST Jan 19, 2014    UPDATED: 11:00 PM PST Jan 19, 2014 
Sidney Poitier, Harry Belafonte, Charlton Heston at March on Washington

When Martin Luther King Jr. gave his "I Have a Dream" speech on the Lincoln Memorial steps during 1963's March on Washington, more than a few famous faces were on hand to help the cause.