Walter Cronkite will introduce Katic Couric on the new CBS EVENING NEWS next week, the DRUDGE REPORT has learned. Cronkite is just one of many superstars, and broadcast legends, that will help the former TODAY host splash onto the nightly news scene. "It's going to be a who's who of Americana," a top CBS source said on Sunday. Cronkite will do the introduction of Couric on opening night only, the source said. CBS brass dismiss the suggestion that adding Cronkite is an attention-grabbing stunt. "This is a bold statement of continuity and 'trust,' a commitment to the quality of the...