It is beyond dispute that President Obama and his aides have an extreme, even unprecedented obsession with concealing embarrassing information, controlling the flow of information, and punishing anyone who stands in the way. But, at least theoretically speaking, it is the job of journalists to impede that effort, not to serve and enable it.

There is a massive apparatus within the United States government that with complete secrecy has been building this enormous structure that has only one goal, and that is to destroy privacy and anonymity, not just in the United States, but around the world.

Terrorism' itself is not an objective term or legitimate object of study, but was conceived of as a highly politicized instrument and has been used that way ever since.

It is true that the Internet can be used to disseminate falsehoods quickly, but it just as quickly roots them out and exposes them in a way that the traditional model of journalism and its closed, insular, one-way form of communication could never do.

Businesses might have been helped by the ability to promote themselves on the Internet, but they have also been hit by the web's encouragement of time-wasting by their staff.

I had a strong interest in free online education, and I was interested in what videos and formats would work for it. A lot of education workers were very sceptical about what computer scientists were doing. It was only after the first visible success of MOOCs that they started to take it seriously.

You don't even realise how much you need Internet, but it really stops you from doing a lot.

Without competition, the spectacular development of technology that we have seen in the last one hundred years in this country would not have happened.