Liveblogging the 50th Anniversary of the "Dream Speech" Commemoration Ceremony

U.S. President Barack Obama will give the keynote address at Wednesday's observance of the 50th anniversary of the March on Washington, the historic 1963 demonstration for equal rights that drew more than 250,000 people to the Lincoln Memorial...Also appearing at Wednesday's anniversary observance will be former presidents Jimmy Carter and Bill Clinton, and media personality Oprah Winfrey.