One minute of Eldrige Cleaver is worth 10 minutes of Roy Wilkins. The labor crisis settled at the negotiating table is nothing compared to the confrontation that results in a strike -- or better yet, violence along the picket lines. Normality has become the nemesis of the network news.Now the upshot of all this controversy is that a narrow and distorted picture of America often emerges from the televised news. A single, dramatic piece of the mosaic becomes in the minds of millions the entire picture. The American who relies upon television for his news mightconclude that the majority of American students are embittered radicals; that the majority of black Americans feel no regard for their country; that violence and lawlessness are the rule rather than the exception on the American campus.We know that none of these conclusions is true.Perhaps the place to start looking for a credibility gap is not in the offices of the Government in Washington but in the studios of the networks in New York!