As I said before, [patriotism] is distinct from acting to benefit the government - a distinction that's increasingly lost today.

It's OK if we wiretap Osama bin Laden. I want to know what he's planning - obviously not him nowadays, but that kind of thing. I don't care if it's a pope or a bin Laden. As long as investigators must go to a judge - an independent judge, a real judge, not a secret judge - and make a showing that there's probable cause to issue a warrant, then they can do that. And that's how it should be done.

US spend more on research and development than the other countries, so we shouldn't be making the internet a more hostile, a more aggressive territory.

You are also asked to take an oath, and that's the oath of service. The oath of service is not to secrecy, but to the Constitution - to protect it against all enemies, foreign and domestic. That's the oath that I kept, that James Clapper and former NSA director Keith Alexander did not. You raise your hand and you take the oath in your class when you are on board. All government officials are made to do it who work for the intelligence agencies - at least, that's where I took the oath.

I've been recognized every now and then. It's always in computer stores. It's something like brain associations, because I'll be in the grocery store and nobody will recognize me. Even in my glasses, looking exactly like my picture, nobody will recognize me. But I could be totally clean-shaven, hat on, looking nothing like myself in a computer store, and they're like, "Snowden?!"

Most of the secrets the CIA has are about people, not machines and systems, so I didn't feel comfortable with disclosures that I thought could endanger anyone.

I don't think there's anything, any threat out there today that anyone can point to, that justifies placing an entire population under mass surveillance.