Warrantless Wiretaps BEFORE 9/11
National Security Documents backing up claim linked here.
On orders from Defense Department officials and President Bush, the agency kept a running list of the names of Americans in its system and made it readily available to a number of senior officials in the Bush administration, these sources said, which in essence meant the NSA was conducting a covert domestic surveillance operation in violation of the law.
...Still, one thing that appears to be indisputable is that the NSA surveillance began well before 9/11 and months before President Bush claims Congress gave him the power to use military force against terrorist threats, which Bush says is why he believed he had the legal right to bypass the judicial process.
According to the online magazine Slate, an unnamed official in the telecom industry said NSA's "efforts to obtain call details go back to early 2001, predating the 9/11 attacks and the president's now celebrated secret executive order. The source reports that the NSA approached U.S. carriers and asked for their cooperation in a 'data-mining' operation, which might eventually cull 'millions' of individual calls and e-mails."
Update: Or Maybe not.