India, Oct. 28 -- John Dickerson, co-anchor of "CBS Evening News" will exit the network at the end of the year, becoming the first well-known employee to leave since Bari Weiss became CBS News's editor-in-chief.

Weiss was hired last month by David Ellison, the new owner of Paramount, to restructure CBS News, and there has been a lot of conjecture about how she might contribute to the network. Under Weiss, "CBS Evening News," which has lagged behind competitors on ABC and NBC since Dickerson and Maurice DuBois started co-anchoring earlier this year, will be the first show to undergo a makeover.

"At the end of this year, I will leave CBS, sixteen years after I sat in as 'Face the Nation' anchor for the first time. I am extremely grateful ...