Washington Post reporters called the communications depart­ments of Apple, Facebook, Google, Yahoo, and other Internet companies. The day before, a report in the British newspaper The Guardian had shocked Americans with evidence that the telecommunications giant Verizon had voluntarily handed a database of every call made on its network to the National Security Agency. The piece was by reporter Glenn Greenwald, and the information came from Edward Snowden, a 29-year-old IT consultant who had left the US with hundreds of thousands of documents detailing the NSA's secret procedures.

Greenwald was the first but not the only journalist that Snowden reached out to. The Post's Barton Gellman had also connected with him. Now, collaborating with documentary filmmaker and Snowden confidante Laura Poitras, he was going to extend the story to Silicon Valley. Gellman wanted to be the first to expose a top-secret NSA program called Prism.