In a series of investigative stories based on top-secret National Security Agency (NSA) documents leaked by former intelligence analyst Edward Snowden, the Guardian US revealed the vast scale and scope of domestic and international surveillance programs, the close relationship between technology companies and intelligence agencies, and how technology is leading to widespread, indiscriminate and routine mass collection of telephone and internet data of millions of Americans. Guardian US reporting has shed unprecedented light on inadequate oversight over surveillance activities and how secretive and outdated laws have failed to keep up with changing technology. On June 5, 2013, the Guardian US was the first to reveal a FISA court order showing how “under the Obama administration the communication records of millions of US citizens are being collected indiscriminately and in bulk.” On June 9, in an exclusive video interview and Q&A published at theguardian.com, the source of the leaks revealed himself as Edward Snowden. The Verizon story would be the first of a series of extensive revelations (enclosed for consideration with this entry) that exposed the scale and sophistication of surveillance programs and the secret laws that govern them. The Guardian's reporting prompted vigorous debate in the US and around the world. The stories have dominated headlines and driven news agendas worldwide. The disclosures exposed misleading statements by senior US administration officials and elicited responses from the highest levels of government -- including The White House, the Office of Director of National Intelligence, Congress and the courts. They prompted numerous legal challenges, Congressional hearings and legislation calling for reform, increased oversight and transparency for NSA programs.