Frank Wisner (one of the founding officers of the CIA) sees (counterintelligence) can be most effective, both in information gathering and protecting friendly intelligence services, when it creatively but vigorously attacks the "structure and personnel of hostile intelligence services", then in 1991 and 1995 US Army manuals dealing with counterintelligence had a broader scope against the then-major intelligence collection disciplines.
Frank Wisner (one of the founding officers of the CIA) sees (counterintelligence) can be most effective, both in information gathering and protecting friendly intelligence services, when it creatively but vigorously attacks the "structure and personnel of hostile intelligence services", then in 1991 and 1995 US Army manuals dealing with counterintelligence had a broader scope against the then-major intelligence collection disciplines.