“Despite the variety and the differences, and however much we proclaim the contrary, what the media produce is neither spontaneous nor completely “free:” “news” does not just happen, pictures and ideas do not merely spring from reality into our eyes and minds, truth is not directly available, we do not have unrestrained variety at our disposal. For like all modes of communication, television, radio, and newspapers observe certain rules and conventions to get things across intelligibly, and it is these, often more than the reality being conveyed, that shape the material delivered by the media.”