Columbia subject headings:
Feature films.
Historical films.
September 11 Terrorist Attacks, 2001--Drama.
United Airlines Flight 93 Hijacking Incident, 2001--Drama.
United States--History--21st century--Drama.
Video recordings for the hearing impaired.
Harvard subject headings:
Hijacking of aircraft--Drama.
September 11 Terrorist Attacks, 2001--Drama.
Terrorism--Drama.
United Airlines Flight 93 Hijacking Incident, 2001--Drama.
Princeton subject headings: