A few days before the crush of Thanksgiving travel began, CBS station KCNC-TV released an investigative report that showed the nation’s largest airplane deicing contractor cheating on worker certification tests.

It was a pretty big story for the station, and unusual enough that Al Tompkins of the Poynter Institute interviewed the reporter, Brian Maass

about the ethical issues raised by doing this kind of undercover piece.

Full disclosure: KCNC is part of the CBS division I work for.