How the NSA Is Transforming Law Enforcement

This article by the Electronic Frontier Foundation is definitely good reading. You should check it out when you get a minute. 
Everything we now know about the NSA paints a picture of an agency that has grown wildly outside the bounds of its purpose—to protect national security. The national security justifications for dragnet surveillance ring hollow. It’s time to take Congress and the President to task for this, and call for an end to the unchecked actions of our dangerous spy agencies­—the NSA and the FBI.