Columbia subject headings:
Security (Law)--Canada.
Security (Law)--Great Britain.
Terrorism--Prevention--Law and legislation--Canada.
Terrorism--Prevention--Law and legislation--Great Britain.
Harvard subject headings:
Security (Law)--Canada.
Security (Law)--Great Britain.
Terrorism--Prevention--Law and legislation--Canada.
Terrorism--Prevention--Law and legislation--Great Britain.
Princeton subject headings:
National security--Law and legislation--Canada.
National security--Law and legislation--Great Britain.
Terrorism--Prevention--Law and legislation--Canada.
Terrorism--Prevention--Law and legislation--Great Britain.