Bloomberg: David Letterman drew his largest audience in more than two decades in his final show as a late-night host on CBS. The “Late Show with David Letterman” attracted 13.8 million viewers on Wednesday night, the network said. That’s the most for the show since February 1994, exceeding even prime-time programs that aired earlier Wednesday evening. Letterman’s finale topped Jay Leno, who drew 10.4 million when he left “The Tonight Show” on NBC last year.