Published on Feb 28, 2014

The latest top-secret documents leaked by Edward Snowden reveal the National Security Agency and its British counterpart, the the Government Communications Headquarters (GCHQ) may have peered into the lives of millions of internet users who were not suspected of wrongdoing. The surveillance program codenamed "Optic Nerve" compiled still images of Yahoo webcam chats in bulk and stored them in the GCHQ's databases with help from the NSA. In one six-month period in 2008 alone, the agency reportedly amassed webcam images from more than 1.8 million Yahoo user accounts worldwide. According to the documents, between 3 and 11 percent of the Yahoo webcam images contained what the GCHQ called "undesirable nudity." The program was reportedly also used for experiments in "automated facial recognition" as well as to monitor terrorism suspects. We speak with James Ball, one of the reporters who broke the story. He is the special projects editor for Guardian U.S.