A document in Central Intelligence Agency’s archive points to the existence of an unofficial “Common Interest Network” of retired intelligence officers. The network, also known as CIN - “as in living-in-sin” according to one of its founders - exists to coordinate the efforts of different organizations. Described as “an unofficial Intelligence Community,” it doesn’t exist except as an abstract, with no chairman, no agenda, and “not even the formality of a rotating host list.” Yet it exists, meeting to discuss influencing Congress and the press, to successfully attack the Freedom of Information Act, and to coordinate the efforts of the organizations that make up the Common Interest Network.