What is the role of intelligence for counterterrorism? Most studies of counterterrorism ignore the vital role of intelligence, focus only on its most controversial aspects, or fail to recognize how counterterrorism intelligence differs from traditional intelligence issues. This article argues that many of the common criticisms of the CIA and other agencies misunderstand counterterrorism intelligence and what is realistic for gaining information on terrorist groups. In particular, the important role of signals intelligence, liaison relationships, document exploitation, and interrogation are overlooked. In addition, intelligence analysis and the relationship with the policymaker differ fundamentally for counterterrorism. This article emphasizes the need to recognize these differences when evaluating counterterrorism and calls for being cautious with intelligence reform. In addition, it argues for changing US detention policy and making the public more aware of the inevitable gaps related to counterterrorism intelligence.