(12. April 2006) The EFF‘s case against AT&T has barely begun, yet it has already brought to light some fascinating details about the methods behind the NSA‘s alleged wiretapping abilities. Mark Klein, a retired AT&T engineer who is now participating in the case as a witness, has released a statement to the media in which he outlines many of the allegations that are currently under seal. Chief among them is his claim that AT&T installed powerful traffic monitoring equipment in a „secret room“ in their San Francisco switching office at the behest of the NSA.