Here is the hidden history of the CIA: why eleven presidents and three generations of CIA officers have been unable to understand the world; why nearly every CIA director has left the agency in worse shape than he found it; and how these failures have profoundly jeopardized our national security. For sixty years, the CIA has managed to maintain a formidable reputation in spite of its terrible record, burying its blunders in top-secret archives. Its mission was to know the world--when it did not succeed, it set out to change the world instead.