. The role of concealment must be taken into account when assess- ing information bearing on the work of espionage services. When I was interviewing James Jesus Angleton—the CIA’s legendary ex- counterintelligence chief, active in the 1970s—for a book on decep- tion, I learned that intelligence services play by a diff

ole of concealment must be taken into account when assessing information bearing on the work of espionage services. I learned when I was interviewing James Jesus Angleton, the CIA’s legendary ex-counterintelligence chief of the CIA in the 1970s for my book on deception that intelligence services play by a different set