ABSTRACT
This chapter explores the prevalence, frequency, and type of digital media use among the some most prominent terrorist movements operating in the United States since the early 1990s. It focuses on the prevalence of the specific types of digital media use among environmental, far-right, and Islamic extremist movements, and discusses how the characteristics of such movements and their adherents aid in explaining the adoption and use of related technologies during the incident planning process. The only evidence of strategic use of Social networking sites was recorded among environmental terrorists. The evolution of these terrorist movements and their associated ideologies were further influenced by technological advances of the 21st century. The internet holds various powerful methods of communicating and expanding social networks. The emergence of the internet and subsequent digital media technologies at the beginning of the 21st century revolutionized social processes and organizations. In addition, no strategic use of SNSs among Islamic extremists was found.
