Chemical Terrorism: The use of chemical agents in TERRORISM. This includes the malevolent use of nerve agents, blood agents, blister agents, and choking agents (NOXAE).Terrorism: The use or threatened use of force or violence against persons or property in violation of criminal laws for purposes of intimidation, coercion, or ransom, in support of political or social objectives.Strategic Stockpile: Planned and coordinated pre-event accumulation of ESSENTIAL DRUGS and medical supplies.Chemical Warfare: Tactical warfare using incendiary mixtures, smokes, or irritant, burning, or asphyxiating gases.Biological Warfare: Warfare involving the use of living organisms or their products as disease etiologic agents against people, animals, or plants.Chemical Warfare Agents: Chemicals that are used to cause the disturbance, disease, or death of humans during WARFARE.Decontamination: The removal of contaminating material, such as radioactive materials, biological materials, or CHEMICAL WARFARE AGENTS, from a person or object.Disaster Planning: Procedures outlined for the care of casualties and the maintenance of services in disasters.Bioterrorism: The use of biological agents in TERRORISM. This includes the malevolent use of BACTERIA; VIRUSES; or other BIOLOGICAL TOXINS against people, ANIMALS; or PLANTS.Civil Defense: Preventive emergency measures and programs designed to protect the individual or community in times of hostile attack.Emergency Shelter: Temporary shelter provided in response to a major disaster or emergency.Stress Disorders, Traumatic: Anxiety disorders manifested by the development of characteristic symptoms following a psychologically traumatic event that is outside the normal range of usual human experience. Symptoms include re-experiencing the traumatic event, increased arousal, and numbing of responsiveness to or reduced involvement with the external world. Traumatic stress disorders can be further classified by the time of onset and the duration of these symptoms.Biological Warfare Agents: Living organisms or their toxic products that are used to cause disease or death of humans during WARFARE.Security Measures: Regulations to assure protection of property and equipment.Epidemiologic Measurements: Statistical calculations on the occurrence of disease or other health-related conditions in defined populations.Bombs: A weapon designed to explode when deployed. It frequently refers to a hollow case filled with EXPLOSIVE AGENTS.Public Health Informatics: The systematic application of information and computer sciences to public health practice, research, and learning.War: Hostile conflict between organized groups of people.Smallpox: An acute, highly contagious, often fatal infectious disease caused by an orthopoxvirus characterized by a biphasic febrile course and distinctive progressive skin eruptions. Vaccination has succeeded in eradicating smallpox worldwide. (Dorland, 28th ed)Public Health Administration: Management of public health organizations or agencies.