NBC Unveils Promo for Jimmy Fallon's 'Tonight Show' (Video)

The teaser features an archive clip tour of the late night show's prior hosts. A little over a month before Jimmy Fallon begins hosting The Tonight Show, NBC has released a teaser for the new version of the late night staple. The clip features an archive clip tour of the late night show's prior hosts (including a brief shot of short-lived Tonight host Conan O'Brien) and a narration pledging a "new era" when Fallon takes the reins from Jay Leno on Feb. 17.  For Leno, this will be his second tim...