At 3 p.m. on Aug. 28, 1963, Atlanta native and Civil Rights leader Martin Luther King Jr. delivered his historic “I Have A Dream Speech” to hundreds of thousands gathered at the Lincoln Memorial for the March on Washington. The march, which called for civil and economic rights for African Americans, remains one of the largest political rallies in American history. Watch MLK deliver the full speech in the video above to mark the 50th anniversary.