@hawkeye10,
hawkeye10 wrote:Looks to me that NSA collects everything because it can not figure out what is important, and then it gets buried in data.
That data was used to check against new pieces of information when they came in.
For instance, say they discover a suspect phone number that they never knew about before. With the phone metadata program, they were able to check and see what activity that phone number had been involved with over the past five years.
Several times they were able to rule out suspicious phone numbers as innocent because of the number's past activity. They then didn't need to waste resources closely monitoring that number.
Now however, when they find a new phone number that seems suspicious, they will no longer have any way of knowing the number's past history.
Or say there is a terrorist that they don't know about. All his internet communications are swept up with everything else on the net, but they don't know about it because they don't know about him.
But later on, he gets caught for some reason. Now that they know about him, they can go back and look at what his past internet communications were, and they might catch him communicating with other terrorists years before he was caught.