Letterman on Leno: "He Is the Funniest Guy I've Ever Known"

Despite what's been said about the late-night wars of the past, talk show host David Letterman tells Oprah his rivalry with Tonight Show host Jay Leno did not start when Dave was passed over for Johnny Carson's old seat. Watch as he reflects on his old friend and reveals why Jay is the funniest—but most insecure—guy he's ever known.