Norah O’Donnell’s final sign-off from “CBS Evening News.”

After five years at the helm of the “CBS Evening News,” Norah O’Donnell is signing off for the final time Thursday as she prepares for a new role with the network. In a special sendoff, Oprah Winfrey looked back on O’Donnell’s time as anchor and managing editor, from her historic interview with Pope Francis in her live broadcast aboard the USS Nimitz.