Columbia subject headings:
National security--Law and legislation--United States--History--21st century.
Terrorism--Prevention--Law and legislation--United States.
United States--Defenses--Law and legislation--History--21st century.
United States. Authorization for Use of Military Force.
War and emergency legislation--United States--History--21st century.
Harvard subject headings:
National security--Law and legislation--United States--History--21st century.
Terrorism--Prevention--Law and legislation--United States
United States. Authorization for Use of Military Force.
War and emergency legislation--United States--History--21st century.
Princeton subject headings: