Any routine viewer who tuned into watch CBS Evening News at 6:30 p.m. Eastern Tuesday night immediately knew something was amiss. By 6:31, anchor Norah O’Donnell would normally be delivering the opening teases. But by 6:32, the commercials were still running and they were all for CBS entertainment properties. It wasn’t until 6:34 when the commercials ended and CBSN, the network’s 24-hour online streaming service, started to play that it was clear that the show wasn’t coming on.