'For over fifteen years, the CIA, with assistance from numerous government agencies, conducted a massive illegal domestic covert operation called Operation CHAOS. It was one of the largest and most pervasive domestic surveillance programs in the history of this country. Throughout the duration of CHAOS, the CIA spied on thousands of U.S. citizens. The CIA went to great lengths to conceal this operation from the public while every president from Eisenhower to Nixon exploited CHAOS for his own political ends.'
https://www.serendipity.li/cia/lyon.htm