dr. mathin luther king jr.'s i have a dream speech is one of the most famous in history. there are a few things americans do not know about it. for instance, the most famous part of tl was not in the original text. it was all ad libbed and then there is a question of what became of the text. swramz brown reports. he 50 years ago george was a 26-year-old former college basketball star who was a last