Latest News Wires Jay Leno leaving 'Tonight,' has NBC learned transition lessons?

Jay Leno leaving: NBC's hand was forced, to its perspective, by ABC when that network put Jimmy Kimmel in the time slot shared by Leno and CBS' David Letterman earlier this year.

Paul Drinkwater/NBC/AP/File

NBC's recent personnel transition in morning television was a disaster. Executives hope their luck is better late at night, and they have a year to try and make it a smooth handoff from Jay Leno to Jimmy Fallon at the "Tonight" show.