A former U.S. intelligence contractor tells Circa he walked away with more than 600 million classified documents on 47 hard drives from the National Security Agency and the CIA, a haul potentially larger than Edward Snowden's now infamous breach. And now he is suing former FBI Director James Comey and other government figures, alleging the bureau has covered up evidence he provided them showing widespread spying on Americans that violated civil liberties. {..snip..}