Columbia subject headings:
Documentary films.
Feature films.
National security--United States.
Nonfiction films.
Official secrets--United States.
Security classification (Government documents)--United States.
Terrorism--United States--Prevention.
Harvard subject headings:
Documentary films
Feature films
National security--United States
Nonfiction films
Official secrets--United States
Security classification (Government documents)--United States
Terrorism--United States--Prevention
Videodiscs
Princeton subject headings: