I have looked into it but not so much, I just felt like posting about the subject as I believe there is unfortunate truth behind it. Here are a few good articles that correlate with what im saying.
http://www.usdoj.gov/oig/special/9712/ch01p1.htm
http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB2/nsaebb2.htm