That's so depressing... I was just guessing...never wanted to be right on this one...
Not vouching for the accuracy of that one, just ran into it while looking for a source I wanted to recommend. Also ran into Operation Mockingbird: CIA Media Manipulation, which has tons of links if you want to poke around on the subject.
The role of the press is to manipulate and misinform. You may recall my absence some years ago, during which time I obsessed over Senate activity. The difference between what the Senate was doing (which is misleading even when viewed directly and compared with the legislation under question) and the press representation of Senate activity is stunning.