Martin Luther King's 'I have a dream' speech remains one of the great monuments of our civilization. Historians consider it one of the Republic's seminal documents, along with the Declaration of Independence and the Gettysburg Address.
Unfortunately, Jefferson and Lincoln lived before the age of video. Luckily for us, King had cameras trained on him when he gave this speech; here it is, freshly youTubed in September of last year.
Daily Gotham has the full text of the speech, here [1].