This book provides a comprehensive summary of the creation of the Department of Homeland Security and efforts to protect the United States from international terrorism. Homeland Security: A Reference Handbook covers the precursor events and laws from 1965 to 2000 that set the stage for the 2002 law that established the Department of Homeland Security. It identifies and discusses a dozen problems associated with homeland security policy objectively, allowing readers to come to their own conclusions. Additionally, it addresses all of the major units and agencies within the department. Comprehensive in scope and accessible in style, it discusses 46 organizations and profiles 50 actors. Unlike many books on the topic, it provides excerpts and summaries of data, presented in figures and tables and as documents from court decisions, presidential actions, and key laws to implement homeland security policy. It also annotates key secondary sources on the topic, including books, scholarly journals, films, and videos to guide the reader to further research on the subject.