In this START Research Highlight, researchers present a preliminary study that offers an overview of the violent incidents and plots committed or attempted by supporters of al-Qa'ida and associated movements (AQAM) inside the United States since 1990. Researchers Joshua D. Freilich, Jeffrey Gruenewald, Steven M. Chermak and William S. Parkin focus on these movements because they are widely viewed as posing a great threat to public safety. Data are drawn from the United States Extremist Crime Database.
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