Chapter 8 of the McGraw-Hill Homeland Security Handbook offers a perspective on significant trends in terrorism over the past four decades. Terrorism has become bloodier, is less dependent on state sponsors, has evolved new models of organization, has become adept at exploiting new communications technologies, involves global campaigns, and has had a strategic impact. None of these trends will allow prediction or extrapolation. Also, terrorists have yet to achieve their stated long-range goals, and terrorists’ use of weapons of mass destruction have not materialized.