Harvey Pitt; Dr. James Watson; Calvin Trillin

Harvey Pitt, chairman of the Securities and Exchange Commission, explains his proposed changes and reform, considered some of the most dramatic in the history of the SEC. James Watson, who discovered the structure of DNA, presents his new book "Genes, Girls, and Gamow," chronicling Watson's life after discovering the double helix. Humorist Calvin Trillin introduces a new genre, the "parking novel," with "Tepper Isn't Going Out."