C'mon folks, this isn't hard to understand.
Bush cronies eavesdropping on potential terrorists with warrants = good.
Bush cronies eavesdropping on who-knows-who without warrants = bad.
It has NOTHING to do with national security and everything to do with following the law. If Bush and his cronies have broken the law, they need to be removed from office and punished. Otherwise, the laws of the land mean nothing. So why on earth is congress allowing Bush cronies to testify without going under oath? This is serious stuff, why is our government piddling around with it? Put everyone under oath, get to the bottom of the story, and then take the appropriate action. If someone refuses to testify under oath, they lose their job.