The first part of this chapter explores the technological aspects of bioterrorism, focusing on the level of difficulty of acquiring and successfully weaponizing biological agents. In this section, various types of bioterrorist attack scenarios are examined, with special attention devoted to assessing the technological feasibility of the discussed attacks. The second part focuses on the contemporary debate about the motivational aspects of bioterrorism. In this section, alternative viewpoints on the threat of the "new terrorism" are examined. The third part concentrates on the likely characteristics of potential bioterrorists with respect to their ideological, organizational, and behavioural characteristics. This section also incorporates patterns in terrorist innovation and compares the advantages and disadvantages of bioterrorism in light of conventional terrorist tactics. An overall evaluation of the threat of bioterrorism for the future is presented in the conclusion.