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As part of the Terrorism and Extremist Violence in the United States (TEVUS) database integration effort, researchers at the Terrorism Research Center in Fulbright College at the University of Arkansas and the University of Oklahoma have been adding: 1) federal terrorism court cases and associated data and 2) incident and antecedent geospatial data from these court cases to the American Terrorism Study (ATS). The goal of the project is to examine geospatial patterns in perpetrator behavior and determine if the patterns identified in earlier studies have changed significantly. The ATS allows examination of a number of different units of analysis. Analyses may examine: (1) characteristics of federal terrorism court cases; (2) the characteristics of persons indicted in each court case or involved in incidents, otherwise referred to as indictees; (3) characteristics of incidents and planned incidents; and (4) antecedent activities that lead up to the incident and are necessary to carry it out and/or achieve the goals of the persons or groups.