Howie Mandel, Dock Diving Dogs, Dirty Projectors Late Show with David Letterman : Season 17 Episode 1

Dave makes an unusual offer to Moammar Khadafi; throughout the night, Dock Diving Dogs make a splash out on 53rd Street; Howie Mandel explains the origins of his obsessive-compulsive disorder; The Dirty Projectors performed "Cannibal Resource."