> Of course, Snowden was only able to review what he saw 5 years ago or more. Why you have any doubts that the NSA, with ample resources to track and control, w

> Of course, Snowden was only able to review what he saw 5 years ago or more. Why you have any doubts that the NSA, with ample resources to track and control, would use techniques similar to what the Chinese do? Do we really need another Snowden to realize this obvious fact? Why do you have so much certainty? What evidence can you provide that they use or currently plan to use these techniques domestically for widespread tracking?