How Russian investigative journalists working for precarious free press outlets exposed the "troll factory"

St Petersburg's Internet Research Agency -- AKA "The Troll Factory" -- is in the news since Robert Mueller indicted 13 of its employees, but it first came to public attention in 2013, when investigative reporters working for the independent newspaper Novaya Gazeta revealed that the agency was working to manipulate Russian public opinion in favor of Putin and the Kremlin and against opposition politicians by flooding Russian online discussions with thousands of "patriotic" posts made under a welter of pseudonyms. Read the rest