Trivia: The film's working title was "Vengeance."
Trivia: There is an extra scene after the credits roll. A computer screen pops up with a question mark and the word goodbye?
Trivia: Is the longest Batman movie ever released in theaters, and the second-longest theatrical superhero film of all time behind "Avengers: Endgame." (Which was only about six minutes longer that this movie).
Trivia: Colin Farrell reportedly went out and grabbed a coffee during a break in filming while he was in his prosthetic Penguin makeup. The prosthetic makeup was so convincing in-person that literally nobody realised it was him.
Answer: In "The Dark Knight," we see Gotham State Police setting up barriers. In short, Gotham has never been shown to be anything akin to the District of Columbia, probably because Gotham is never meant to be the capital of the country.