What is wonderful about America - and it's really the core instrument of a democracy - is the ability to have free speech, is the ability to have these arguments; it's how we created ourselves as a nation.
What do you hope HBO audiences will take away from the film?
I hope audiences will watch this film and look at what we have learned in our history, whether it be locking up Socialists during World War I or interning the Japanese during World War II. None of these things have really kept us safer. So I think when we look at civil liberties in our country, what is wonderful about America - and it's really the core instrument of a democracy - is the ability to have free speech, is the ability to have these arguments; it's how we created ourselves as a nation. And as my father says in the beginning of the film, for our Founding Fathers to write the First Amendment and to imagine these freedoms-it was so revolutionary and brilliant, and it's really the cornerstone of all of our freedoms.
There's a quote in the film that without free speech you can't fight for the rest of your freedoms. It's the one that allows you to fight for the rest of them, and that is so important to keep in mind as people think, well, there's no other opinion about 9/11, or there's no other opinion about the Middle East crisis, that of course there are other opinions, and we need to protect even those ideas that we hate.
We see today the streets of Iran are overwhelmed with people exercising their right to protest. Free speech, free expression, free assembly-those are the guarantees that we have a free society. And we need to celebrate them and understand them.