Hard to believe that Cheney did not know
If Libby lied about how he discovered Plame's identity - he claims he heard it from journalists and had forgotten Cheney had told him - why would he tell such clumsy fibs? The only rational explanation is he was protecting his boss.
http://www.informationclearinghouse.info/article10834.htm
http://www.informationclearinghouse.info/article10834.htm
Starmail - 1. Nov, 13:44