The Guardian [has] released a classified court order requiring Verizon to turn over records of all domestic phone calls to the National Security Agency. The revelation has led to a renewed debate over the legality and policy merits of indiscriminate government surveillance of Americans. The court order, issued by the secret Foreign Intelligence Surveillance court, only sought metadata - a fancy word for information like what numbers you called, what time you made the calls, and how long the calls were. The order does not seek the audio of calls. Of course, it's possible the NSA has other programs collecting the contents of calls. In 2006 a whistleblower reported the existence of a secret, NSA-controlled room in an AT&T switching facility in San Francisco. So it's possible the NSA is using rooms like that to listen to everyone's phone calls. But all we know for sure is that the NSA has been requesting information about our phone calls. We only have proof of spying on Verizon customers, but it's hard to imagine the NSA limiting its surveillance program to one company. There are probably similar orders in effect for AT&T and CenturyLink, the other major telephone companies. The order includes hints that the NSA is also collecting information from cellular customers. In addition to phone numbers and call times, the order seeks information about the specific cell phone tower the customer used to connect to the network during each call. Cellphones make calls using the closest tower. So if the NSA knows you made a call using a specific tower, they can safely assume you were near that tower at the time of the call.