This message was recorded at Prison Radio for the Grass Roots Radio Conference, August 19, 2011. Speech to the Grass Roots Radio ConferenceAugust 14, 2011 by Mumia Abu-JamalOna Move! Long Live John Africa!Dear friends: Attendees at the Grass Roots Radio Conference! Thank you for your invitation. I join y'all today, this way, by necessity; but we are joined by our common love of radio, still a vib...