In Chatter, Patrick Radden Keefe investigates the international eavesdropping alliance known as Echelon, sorting facts from conspiracy theories to determine just how much privacy Americans unknowingly sacrifice in the name of greater security. Keefe's riveting investigation moves from a secret listening station in England's Yorkshire moors to the intelligence bureaucracies of Washington and London; from an abandoned National Security Agency base hidden in the mountains of North Carolina to the European Parliament in Brussels.Along the way Keefe meets intelligence eavesdroppers who listen in on other people's private conversations, protestors who believe that systems like Echelon will end privacy as we know it, former senators who feel American intelligence operates without any effective legislative oversight, and the journalists who brought Echelon to light. As the struggle between national security and civil liberties becomes ever more pronounced against a backdrop of global terrorism, Chatter is sure to fire debate.