Much of what I saw in Geneva really disillusioned me about how my government functions and what its impact is in the world. I realised that I was part of something that was doing far more harm than good.

If Congress is going to investigate baseball players about whether or not they told the truth, how can we justify giving the most powerful intelligence official, [James] Clapper, a pass? This is how J. Edgar Hoover ended up in charge of the FBI forever.

That's the key - to maintain the garden of liberty, right? This is a generational thing that we must all do continuously. We only have the rights that we protect. It doesn't matter what we say or think we have. It's not enough to believe in something; it matters what we actually defend.

I know that fundamentally, changes to the fabric of the internet, and sort of our methods of communication, can enforce our rights.

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.

You're not patriotic just because you back whoever's in power today or their policies. You're patriotic when you work to improve the lives of the people of your country, your community and your family. Sometimes that means making hard choices, choices that go against your personal interest.

There are unquestionable violations of our Constitution.