Columbia subject headings:
National security--United States.
Terrorism--Government policy--United States.
Terrorism--United States--Prevention.
Terrorism.
United States--Defenses.
United States. National Commission on Terrorism.
Harvard subject headings:
National security--United States
Terrorism--Government policy--United States
Terrorism--United States--Prevention
Terrorism.
United States--Defenses.
United States. National Commission on Terrorism.
Princeton subject headings:
National security--United States.
Terrorism--Government policy--United States.
Terrorism--United States--Prevention.
Terrorism.
United States--Defenses.
United States. National Commission on Terrorism