Link Analysis is an extremely powerful analytic tool that has been in the law enforcement and intelligence arsenal for over twenty years. Used effectively in countless analyses and investigations, it graphically portrays the linkages between and among individuals, cells, and groups. The technique analyzes the connections among people, places, and objects, to identify latent group structures and relationships, and isolate communications paths, hierarchical relationships, factors that promote group strength and cohesiveness, and organizational vulnerabilities to disruption, penetration, or interdiction. It is ideal for revealing the hidden connections among perpetrators and the structure of clandestine, organized criminal entities including intelligence operations, terrorist groups, organized crime syndicates, and narcotics cartels. It is also extremely useful to track relationships among the individuals and groups involved in the illegal transfer or diversion of special technologies.