Norah O'Donnell did her last broadcast for 'CBS Evening News' just before the network and parent Paramount Global tinker with its venerable formula

The ratings-challenged “CBS Evening News” is set to make a risky pivot following the departure of Norah O’Donnell — scrapping the traditional, anchor-driven format in favor of multi-anchor ensemble

Led by co-anchors John Dickerson and Maurice DuBois, the reimagined 'CBS Evening News' will be a collaborative effort from an ensemble of talent to bring in-depth reporting to viewers' screens