Leno, Fallon weigh in on transition

Jay Leno and Jimmy Fallon traded last night  what you'd expect - jokes. Jay: Rumors already starting that Justin Bieber will replace Jimmy in five years... Jimmy? Well, in his monologue he barely touched on the transition...but the Roots played the old classic "Tonight Show" lead-in, and that's kind of all that was needed...In the host chat segment later Jimmy talked about how emotional this whole thing was, etc., and thanked Jay for being so gracious and...this: His move to "Tonight" (he said) will actually be February, not March of '14, as was indicated yesterday...