btw, interesting tit bit from CIA site FAQs
Does the CIA spy on Americans? Does it keep a file on you?
CIA’s mission is to collect information related to foreign intelligence and foreign counterintelligence. By law, the CIA is specifically prohibited from collecting intelligence concerning the domestic activities of U.S. citizens. By direction of the President in Executive Order 12333, as amended, and in accordance with procedures approved by the Attorney General, the CIA is restricted in the collection of intelligence information directed against U.S. citizens. Collection is allowed only for an authorized intelligence purpose; for example, if there is a reason to believe that an individual is involved in espionage or international terrorist activities. The CIA’s procedures require senior approval for any such collection that is allowed, and, depending on the collection technique employed, the sanction of the Director of National Intelligence and Attorney General may be required. These restrictions on the CIA, or similar ones, have been in effect since the 1970s.