In the paper we present a cluster based approach for terrorist network evolution. We have applied hierarchical agglomerative clustering approach to 9/11 case study. We show that, how individual actors who are initially isolated from each other are converted in small clusters and result in a fully evolved network. This method of network evolution can help intelligence security analysts to understand the structure of the network.
2011 European Intelligence and Security Informatics Conference, 2011, p. 116-122