NOI.org COINTELPRO Reading Room

Starting in the early days of the Cold War (late 40's), the CIA began a secret project called Operation Mockingbird, with the intent of buying influence behind the scenes at major media outlets and putting reporters on the CIA payroll, which has proven to be a stunning ongoing success.

Source, RevolutionNews.US

Related links:
How Americas Most Powerful News Media Worked Hand in Glove with the CIA
The CIA's Project MOCKINGBIRD: Ongoing Covert Control of the Media