The Project X counterinsurgency manuals were "a guide for the conduct of clandestine operations" against insurgents and political adversaries calling for social reform. Some of the material used until 1991 included manuals on "Agent Handling" and "Counterintelligence," which "provided training regarding the use of sodiopentathol [truth serum] compound in interrogation, abduction of adversary family members to influence the adversary, prioritization of adversary personalities for abduction, exile, physical beatings and execution." The manual suggests the creation of inventories of families and their assets to keep tabs on the population. One of the lessons described "a general introduction to censorship to include reference to Armed Forces Censorship...and National Censorship." Students are