An intelligence source with extensive knowledge of the National Security Agency's systems told the Guardian the US complaints again China were hypocritical, because America had participated in offensive cyber operations and widespread hacking – breaking into foreign computer systems to mine information.Provided anonymity to speak critically about classified practices, the source said: "We hack everyone everywhere. We like to make a distinction between us and the others. But we are in almost every country in the world."The US likes to haul China before the international court of public opinion for "doing what we do every day", the source added.