PrefaceThe twentieth century witnessed the creation and developmentof Weapons of Mass Destruction: nuclear, chemical, and biological.While such weapons have been used in major wars, regionalconflicts, and terrorism, this chapter will focus on the latter.Weapons of Mass Destruction all have the potential to create masscasualties, public panic, and enormous property destruction. Theyrepresent an existing and growing security and safety risk for allthe citizens of the world.