that is where specifically only certain individuals are targeted, those ones, under the criteria linked to terrorism. numerous occasions as i've outlined in some of the examples, those individuals, outside the united states were discovered communicating with someone inside the united states. we then, that is being tipped from the nsa. we then go through the legal process here, the fbi does, regarding that u.s. person. so we go and we have to serve what is called a national security letter to identify the subscriber, it's much like a subpoena, following that if we want to pursue electronic surveillance we have to make a specific application regarding that person with the fiza court here. >> that's what i was looking for. thanks very much. i yield back. >> if i could, just to follow on and to clarify, as we're going through this i want to make sure everything we say is exactly right from my perspective, as shaun said nsa may not target