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![KGB, Information Nr. 2955 [to Bulgarian State Security], 7 September 1985. Source: CDDAABCSSISBNA-R, Fond (F.) 9, Opis (Op.) 4, A.E. 663, pp. 208-9.](https://www.salon.com/app/uploads/2020/05/mitpress-operationdenver-cover.jpg "Lessons from Operation \"Denver\"")
