Yes, and that is the controversy, that it was United States persons, citizens, who were spied on without a warant...which is ILLEGAL.
http://www.freerepublic.com/focus/f-news/1425390/posts
Illegal?
Stopped the guys mentioned above.
http://www.freerepublic.com/focus/f-news/1542415/posts
Here's another..
Really? Who?
If those US Citizens were part of an "association" (as defined), such as Al Quada, the law makes it clear that they could be wire-taped.
This works just like the RICO (racketering) wiretaps that have been used for 30 years, signed by JohnFKennedy.
Just like you don't have to get a warrant for individual mobster; you don't have to get a warrant for every terrorists group member.
Period.