Columbia subject headings:
Information services--Law and legislation--United States.
Intergovernmental cooperation--United States.
National security--Law and legislation--United States.
National security--United States--Information services.
Terrorism--United States--Prevention--Information services.
Harvard subject headings:
Information services--Law and legislation--United States.
Intergovernmental cooperation--United States.
National security--Law and legislation--United States
National security--United States--Information services.
Terrorism--United States--Prevention--Information services.
Princeton subject headings:
Information services--Law and legislation--United States.
Intergovernmental cooperation--United States.
National security--Law and legislation--United States.
National security--United States--Information services.
Terrorism--United States--Prevention--Information services.