he also called the government's phone data collection almost orwellian. president obama said the information was collecting information on who called who and where. >> nobody is listening to your telephone calls. that's not what this program is about. >> reporter: and that it's kept america safe. >> we know of at least 50 threats that have been averted because of this information. >> reporter: but judge leon said there is an utter lack of evidence that a terrorist attack has ever been prevented because searching the nsa database is faster than other investigative the ruling is a victory for fugitive nsa hacker edward snowden. the classified documents he leaked gave the first glimpse into the nsa surveillance. karen travers, abc news, washington. >> the nsa spying issue is one of the challenges faced by the new director of homeland