Couric should try what NPR and PBS do

What should CBS and Katie Couric do with the Evening News? On CBS's site, guest columnist William Powers from the National Journal suggests, among other things, taking a page from NPR and PBS's NewsHour: "Slow down. Tell us a few important stories, slowly. Help us breathe and think." And let Couric talk at length with guests, as Jim Lehrer and company do.