BBC Online : President Barack Obama has ordered curbs on the use of bulk data collected by US intelligence agencies, saying civil liberties must be respected. Obama said such data had prevented terror attacks at home and abroad, but that in tackling threats the government risked over-reaching itself. However civil liberties groups have said the changes do not go far enough. The announcement follows widespread anger after leaks revealed the full extent of US surveillance operations. The leaked documents revealed that the US collects massive amounts of electronic data from communications of private individuals around the world, and has spied on foreign leaders. The latest revelations claim that US agencies have collected and stored almost 200 million text messages every day across the globe, according to the Guardian newspaper and Channel 4 News. In his much-anticipated speech at the Department of Justice, Obama said he would not apologise for the effectiveness of US intelligence operations, and insisted nothing he had seen indicated they had sought to break the law. It was necessary for the US to continue collecting large amounts of data, he said, but acknowledged “the potential of abuse”. “The reforms I’m proposing today should give the American people greater confidence that their rights are being protected, even as our intelligence and law enforcement agencies maintain the tools they need to keep us safe,” he said. President Obama and Chancellor Merkel in Berlin (19 June 2013) The US was embarrassed by the reports it had spied on German Chancellor Angela Merkel Details of the times, numbers and durations of phone calls – known as metadata – are currently collected and held by the National Security Agency (NSA). But Obama said he was ending that system “as it currently exists”. He has asked the attorney general and the intelligence community to draw up plans for metadata to be held by a third party, with the NSA requiring legal permission to access them. A panel of independent privacy advocates would also sit on the secret Foreign Intelligence Surveillance Court (FISC) which has responsibility for giving permission for mass surveillance programmes.