I found this youtube clip the other day that has become my second favorite clip (behind the Milton Friedman "Greed" clip). It shows a very old (probably about 92) Milton Friedman giving a short interview to a 5th grader. His answers give a perfect example of what an incredible communicator he was, giving very concise, almost deceptively simple answers, to what are very complicated questions.
I particularly like his final answer when asked to give advice to high school students.