All software and hardware has had a backdoor of some kind for a long time and the feds have always had access to it if they wanted since they can get a warrant for anything anytime. That's why if Bush really did authorize wiretaps of american citizens ( and it would appear that he did) he should be prosecuted (but he won't be) for his actions since there is really no excuse for not getting a warrant. Think about it folks, if Osama or his lackeys were making calls back to the states and the NSA found out, (which it appears they were and they did) do you really think a federal judge would deny them a warrant and do you really think they couldn't get one at a moments notice? And even if a judge did deny a warrant there are plenty of other federal judges available to choose from.