Angleton told a friend in British intelligence, “I would kill Philby.” The betrayal was painfully intimate, and it bred a paranoia that bloomed darkly within Angleton. When he was named counterintelligence chief, he saw traitors and signs of Soviet treachery everywhere. His compulsive mole hunting ruined the careers of dozens of CIA agents, doing more to damage agency security than to fortify it. “I couldn’t find that we ever caught a spy under Jim,” said William Colby, the CIA director who finally terminated Angleton’s long tenure in 1975. But under Dulles, Angleton enjoyed free rein to
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