A Silly Question

Since the NSA has been exposed spying on all Internet, e-mail and phone usage in the United States, they have claimed they have broken up about 50 times.

So, why hasn't anybody been charged?

Like in this case: Disclosing new details, a top FBI official claimed the surveillance efforts helped disrupt a plot to bomb the New York Stock Exchange. FBI Deputy Director Sean Joyce said NSA officials discovered the scheme while monitoring a known extremist in Yemen, who was in contact with an individual in the U.S. After initiating surveillance, Joyce said, they were able to detect "nascent plotting" to bomb the stock exchange and ultimately disrupt the plot.
Read more: http://www.foxnews.com/politics/2013/06/18/nsa-chief-defends-surveillance-says-helped-prevent-terror-more-than-50-times/?test=latestnews#ixzz2WdVa0BgA
Silly question indeed.