I can't even IMAGINE that Washington and the Continental Congress would not intercept British communications this way.
Or Lincoln intercepting Confederate telegraphs.
Or Wilson and FDR not monitoring phone calls to Germany.
It's no different now. If I call Zarquawi or he calls me, there is no reason the CIC needs to get permission to listen in.
You'd be infringing on his civil liberties....
/sarcasm
Starting with this: What if I don't? What if I don't call Zarqawi - or any other known terrorist - and they don't call me? Do you believe a warrant is required to tap my phone?
If not, what allows my phone to be tapped without a warrant?
Is it ILLEGAL to tap the phones of US citizens who are NOT making calls to or receiving calls from known terrorists without first obtaining a warrant?