At the turn of the century, the Central Intelligence Agency was in crisis. The end of the Cold War had robbed the agency of its mission. More than thirty overseas stations and bases had been shuttered, and scores that remained had been severely cut back. Many countries where surveillance was once deemed crucial went uncovered. Essential intelligence wasn’t being collected. At the dawn of the information age, the CIA’s officers and analysts worked with outmoded technology, struggling to distinguish the clear signals of significant facts from the cacophony of background noise. Then came September 11th, 2001. After the attacks, the CIA transformed itself into a lethal paramilitary force, running secret prisons and brutal interrogations, mounting deadly drone attacks, and all but abandoning its core missions of espionage and counterespionage. The consequences were grave: the deaths of scores of its recruited foreign agents, the theft of its personnel files by Chinese spies, the penetration