News Corp. just can’t avoid controversy. The latest: The Wall Street Journal has allegedly beefed up its circulation numbers by purchasing thousands of copies of the paper with money channeled through external European companies. The scheme was organized in London, and New York executives learned about it after they were informed by an internal whistleblower. Inquiries from The Guardian have already prompted Andrew Langhoff, Dow Jones and Co.’s European managing director, to resign Tuesday. The Guardian has discovered emails and documents that fuel the theory that Langhoff was behind the scam.