if they want to get you, they ll get you in time. reporter: snowden knows how every phone call, credit card transaction and airport checkpoint could be used to find him. he said from the start that he knows once he made the choice to inform the public about the programs that all of his options were bad options. i think it is safe to say that we won t be living a free and unrestrained life. reporter: in washington, congress has been receiving classified briefings about the national security agency s phone gathering and internet monitoring operations. in a public hearing, head of the nsa, general keith alexander defended the programs. we have to go back and look at these processes, the oversight. we had those. where they went wrong. and how we fix those. reporter: now there is word of more documents. the south china post says that snowden provided unverified information showing the u.s. has mounted a massive hacking operation against chinese targets. john, diana. tahman, th