Columbia subject headings:
Motion pictures--United States--History--21st century.
September 11 Terrorist Attacks, 2001--Influence.
Harvard subject headings:
Motion pictures--United States--History--21st century.
Princeton subject headings:
Motion pictures--United States--History--21st century.
September 11 Terrorist Attacks, 2001, in motion pictures.
September 11 Terrorist Attacks, 2001--Influence.