If the government is analyzing Americans’ phone records to discover and track terrorist networks — or ever plans to do so — the requisite technology would cost a lot of money, demand considerable computing power and raise privacy issues, observers say. The possibility that the government is sifting through tens of millions of phone records came to the public’s attention earlier this month after USA Today reported that the National Security Agency had collected records from AT&T, Verizon and BellSouth. Full Story