We have to be able to ask questions in order to answer them.

The question is: Particularly in the post-9/11 era, are societies becoming more liberal or more authoritarian?

Look at the reactions of liberal governments to the surveillance revelations during the last years. In the United States, we've got this big debate, but we've got official paralysis - because they're the ones who had their hand caught most deeply in the cookie jar.

The surveillance revelations are critically important because they revealed that our rights are being redefined in secret, by secret courts that were never intended to have that role - without the consent of the public, without even the awareness of the majority of our political representatives.

Nobody's going to vote for Isis.

I considered bringing forward information about these surveillance programs prior to the election, but I held off because I believed that [Barack] Obama was genuine when he said he was going to change things. I wanted to give the democratic process time to work.

People sometimes say I broke an oath of secrecy - one of the early charges leveled against me. But it's a fundamental misunderstanding, because there is no oath of secrecy for people who work in the intelligence community. You are asked to sign a civil agreement, called a Standard Form 312, which basically says if you disclose classified information, they can sue you; they can do this, that and the other. And you risk going to jail.