Columbia subject headings:
Civil defense--United States--Planning.
Emergency management--United States--Planning.
Incident command systems--United States.
Preparedness--Government policy--United States.
Terrorism--Prevention--Government policy--United States.
Harvard subject headings:
Civil defense--United States--Planning.
Emergency management--United States--Planning.
Incident command systems--United States.
Preparedness--Government policy--United States.
Terrorism--Prevention--Government policy--United States
Princeton subject headings:
Civil defense--United States--Planning.
Emergency management--United States--Planning.
Incident command systems--United States.
Preparedness--Government policy--United States.
Terrorism--Prevention--Government policy--United States.