Nightly News | January 21, 2010
>> out west, george, thanks.
>>> the worst-kept secret in late night is official. conan o'brien leaving this network after just seven months as host of "the tonight show ." jay leno has been dropped from his primetime show and is going back into his old time slot, and it's all made for an all-out war among the hosts who spent a good deal of their monologues attacking each other this week. judge.