CBS News anchor Norah O'Donnell is stepping down as the face of "CBS Evening News" but will remain with the network as a correspondent. "After this year’s election, I’ve decided I will be leaving my role as anchor and managing editor of the CBS Evening News to take on a new position at the network. We just celebrated an amazing five years together. I love what I do, and I am so fortunate to work with the best journalists and people in the business," O'Donnell wrote in a note to staff Tuesday.""This presidential election will be my seventh as a journalist,