When it comes to political engagement, I'm not a politician - I'm an engineer.

Sometimes that irrational commitment to principle is what society needs to survive. Whenever you talk about radicalism, whenever you talk about activism, whenever you talk about progressive activity, that sort of moves the measure of liberty in human society forward, makes us all enjoy a better standard of liberty, it typically starts out criminal. It typically starts out a little bit shaky, and rather radical. And that's irrational to put yourself up to do that.

The reality is if we sit back and allow a few officials behind closed doors to launch offensive attacks without any oversight against foreign nations, against people we don't like, against political groups, radicals, and extremists whose ideas we may not agree with, and could be repulsive or even violent - if we let that happen without public buy-in, we won't have any seat at the table of government to decide whether or not it's appropriate for these officials to drag us into some kind of war activity that we don't want, but we weren't aware of at the time.

What we're really debating is not security versus liberty, it's security versus surveillance. When we talk about electronic interception, the way that surveillance works is it preys on the weakness of protections that are being applied to all of our communications. The manner in which they're protected.

Some months after [Keith Alexander] made that statement [Edward Snowden cause grave and irrevocable harm to the nation], the new director of the NSA, Michael Rogers, said that, in fact, he doesn't see the sky falling. It's not so serious after all.

It's clear the CIA was trying to play 'keep away' with documents relevant to an investigation by their overseers in Congress, and that's a serious constitutional concern. But it's equally if not more concerning that we're seeing another 'Merkel Effect,' where an elected official does not care at all that the rights of millions of ordinary citizens are violated by our spies, but suddenly it's a scandal when a politician finds out the same thing happens to them.

I have had no contact with the Chinese government ... I only work with journalists.