This was a bomb that had been ticking for a while.
NBC executives were warned a year ago that Brian Williams was constantly inflating his biography. They were flummoxed over why the leading network anchor felt that he needed Hemingwayesque, bullets-whizzing-by flourishes to puff himself up, sometimes to the point where it was a joke in the news division.
But in the age of social media, keeping TV news relevant is apparently one battle that even the 'heroic' Williams will probably lose.