You could change NSA to CIA and your comment would still be just as invalid. We aren't supposed to know much of the work they do. We know that ultimately their

You could change NSA to CIA and your comment would still be just as invalid. We aren't supposed to know much of the work they do. We know that ultimately their data helps law enforcement agencies do their jobs, and helps the DoD / Executive branch make more informed decisions about our adversaries. It is infinitely difficult to quantify the value provided by the NSA's international surveillance apparatus.