Pit Bull: The History Of America's Most Feared Dog : Fresh Air Author Bronwen Dickey says the idea of pit bulls as predators is based on myth and misinformation. In the early Hollywood era, the dogs were often chosen to appear in comedies. Her book is 'Pit Bull: The Battle Over an American Icon.' Rock historian Ed Ward shares soul singer Clarence Carter's story. Book critic Maureen Corrigan reviews 'Heat & Light' by Jennifer Haigh.