there are people that want to attack this country. >> nobody doubts that the government has the right to keep some secrets and we are keeping some secrets. we're not disclosing the technical means by which the nsa spies on people to spy on people and replicate it. we're not disclosing the names of people to whom the spying has been directed. what the government doesn't have the right to do is to implement policies that affect the world in which we live, and the kind of country that we are, without any accountability or transparency. >> snowden said that the nsa has been hacking computers in china since 2009. he showed the newspaper documents to support the claim. but the paper says it couldn't independently verify them. does that line up with what he told you, or can you say? >> he was very clear about the fact as the u.s. goes around the world threatening and warning people about the dangers of cyber attacks, that the u.s. is one of the most prolific, if not