In this episode of Intelligence Matters, host Michael Morell speaks with Glenn Gerstell, the National Security Agency's top legal officer. They discuss the looming legal, ethical and societal implications of the digital revolution underway across the globe, as well as the challenges posed by the rapid development and adoption of new technologies. Gerstell explains how changes in the information landscape have prompted an evolution in the NSA's own approach to transparency. He also details the NSA's internal protocols for identifying surveillance targets and unmasking individuals whose communications are captured by incidental collection.