The content of each volume stems from a forum of agency representatives and experts from national, State, and local agencies responsible for dealing with terrorism. This paper emphasizes the importance of the intelligence function and offers recommendations for the establishment of a successful intelligence function for local law enforcement agencies designed to prevent terrorist attacks. Intelligence is defined as "an actionable inference or a set of related inferences derived from some form of inductive or deductive logic." By combining information, analysis, and interpretation, intelligence helps to document a threat, ascertain its probability of occurring, and define an effective response, all in a timely manner. This paper emphasizes the importance of obtaining intelligence on crimes that can be related to the planning of terrorist attacks, such as fraudulent identifications, trafficking in illegal merchandise, and drug sales as means for funding and executing terrorist attacks. This paper presents a model of Federal, State, and local information sharing and outlines standards for data quality and usability. A section on "intelligence-led policing" describes the Global Justice Information Sharing Initiative, presents a case study from the United Kingdom on intelligence-led policing, and promotes the need for trained and accredited analysts of criminal intelligence. A discussion of the development of a successful intelligence function includes a presentation of the model of the Terrorism Early Warning Group, an interagency effort begun in Los Angeles in 1996. The paper concludes with a summary of recommendations for building an effective and efficient multilateral system of intelligence production and sharing. 15 references and appended guide to incorporating the intelligence function into community policing and a list of intelligence training and counterterrorism funding resources