Click HERE for ABC's Coverage of 50th Anniversary of Martin Luther King's "I Have a Dream" speech.

ABC News and Yahoo! News will host a first-ever live global broadcast on Wednesday, August 28 to commemorate the 50th anniversary of the Martin Luther King’s March on Washington and his iconic “I Have a Dream” speech. This hybrid digital-television event will be anchored by George Stephanopoulos along with Dan Kloeffer from ABC News World Headquarters in New York beginning at 10 a.m.