Vulnerabilities abound in U.S. society. The openness and efficiency of our key infrastructures â€" transportation, information and telecommunications systems, health systems, the electric power grid, emergency response units, food and water supplies, and others â€" make them susceptible to terrorist attacks. Making the Nation Safer discusses technical approaches to mitigating these vulnerabilities. A broad range of topics are covered in this book, including Nuclear and radiological threats, such as improvised nuclear devices and "dirty bombs;" Bioterrorism, medical research, agricultural systems and public health; Toxic chemicals and explosive materials; Information technology, such as communications systems, data management, cyber attacks, and identification and authentication systems; Energy systems, such as the electrical power grid and oil and natural gas systems; Transportation systems; Cities and fixed infrastructures, such as buildings, emergency operations centers, and tunnels; The response of people to terrorism, such as how quality of life and morale of the population can be a target of terrorists and how people respond to terrorist attacks; and Linked infrastructures, i.e. the vulnerabilities that result from the interdependencies of key systems. I.