New York Times: “A QR code — the checkerboard-like, black-and-white box that can be scanned by a smartphone — will appear onscreen for long stretches of the CBS telecast. Viewers who scan the code will be directed to the CBS News website, where a squad of about 20 CBS journalists will post fact-checks of the candidates’ remarks in real time.” “The code will appear only on CBS; viewers who tune in on a different channel will not see it.”