[Happy Monkey]

I think you're missing the point. It's not that they are investigating leaks. It is that they are investigating leaks by using warrantless searches of a database of every phone call made through the majority of the phone companies in the US. These phone calls are not a) international or b) involving a known terrorist, so this is the first example to surface of the use of this NSA program for warrantless domestic surveilance outside of a terrorism investigation.