Funny thing - if you read the wikipedia page that covers the NSA, it's mind boggling how much money has been poured into that agency, and what little return we've seen on that investment. The headqurters look like someone's science fiction wet dream.
Feinstein recently commented something to the effect that the reason they collect all this information is because "immediacy is imperative" in order to foil terrorist plots. It's a hilarious statement, because it's something her little pet agency has yet to do. That being the case, how could she possibly know this? Her reasoning defies everything we've ever seen with respect to information and terrorism.