Active reserve (KGB) officers with a military rank who worked undercover in the Soviet Union. "Trusted contacts" were high placed civilians who collaborated with the KGB without signing any official working agreements, such as directors of personnel departments at various institutions, academics, deans, or writers and actors. Informers were citizens secretly recruited by the KGB, sometimes using forceful recruitment methods, such as blackmail. The precise number of people from various categories remains unknown, but one of the estimates was 11 million "informers" in the Soviet Union, or one out of every eighteen adult citizens The active reserve was established by Yuri Andropov in
KGB moles in two key places—the counter-intelligence section of CIA and the FBI's counter-intelligence department—through whom they would know of, and control, US counter-espionage to protect the moles and hamper the detection and capture of other Communist spies. Moreover, KGB counter-intelligence vetted foreign intelligence sources, so that the moles might "officially" approve an anti-CIA double agent as trustworthy. In retrospect, the captures of the moles Aldrich Ames and Robert Hanssen proved that Angleton, though ignored as over-aggressive, was correct, despite the fact that it cost him his job at CIA, which he left in 1975. In the mid-1970s, the KGB tried