Operation Mockingbird was a secret campaign by the United States Central Intelligence Agency (CIA) to influence media.
details of Operation Mockingbird were revealed as a result of the Senator Frank Church investigations (Select Committee to Study Governmental Operations with Respect to Intelligence Activities) in 1975. According to the Congress report published in 1976:
"The CIA currently maintains a network of several hundred foreign individuals around the world who provide intelligence for the CIA and at times attempt to influence opinion through the use of covert propaganda. These individuals provide the CIA with direct access to a large number of newspapers and periodicals, scores of press services and news agencies, radio and television stations, commercial book publishers, and other foreign media outlets."
In 1983, 50 companies owned 90 percent of the media consumed by Americans. By 2012, just six companies — including Fox (then part of News Corporation) and Time Warner — controlled that 90 percent, according to testimony before the House Judiciary Committee examining Comcast’s acquisition of NBCUniversal. http://www.nytimes.com/2014/07/26/bus...