Columbia subject headings:
Electronic surveillance--United States.
Militia movements--United States.
Terrorism--United States--Prevention.
Terrorists--United States.
Harvard subject headings:
Electronic surveillance--United States
Militia movements--United States
Terrorism--United States--Prevention
Terrorists--United States
Princeton subject headings:
Electronic surveillance--United States.
Militia movements--United States.
Terrorism--United States--Prevention.
Terrorism--United States.
Terrorists--United States.