A science-based text, New Developments in Biological and Chemical Terrorism Countermeasures presents research that addresses the growing threat of chemical and biological terrorism as well as the need for improvements in the implementation of countermeasures. This new textbook building upon Advances in Biological and Chemical Terrorism Countermeasures is the product of more than a decade of synthesizing newly acquired information through extensive research and development supported by the United States Army through Texas Tech University's Admiral Elmo R. Zumwalt, Jr. National Program for Countermeasures to Biological and Chemical Threats. The book describes and expands upon threats, vulnerabilities, and pathogenic and toxic effects associated with agents used in biological and chemical terrorism. Among the discussions of agents is an exceptionally thorough examination of ricin history, toxicity, adsorption, and mobility. It also gives an overview of protective gear and in-depth perspectives on future research needs, including identifying challenges and paths forward in predicting risks. Effective countermeasures to biological and chemical threats are becoming increasingly necessary. New Developments in Biological and Chemical Terrorism Countermeasures provides a cutting-edge source addressing and advancing this need. It offers strategies and expert viewpoints toward improving defenses against threats in the United States as well as other nations.