Glenn Greenwald vs. the NSA

Guardian columnist Glenn Greenwald discusses his continued reporting on the NSA's surveillance of telephone and digital records, and his upcoming congressional testimony on the program. Plus, the latest on NSA leaker Edward Snowden, with whom Greenwald says he is "regularly" in touch, and last week's surprisingly close vote in Congress over whether to limit the NSA's scope. Greenwald says he sees public opinion around surveillance shifting: "Americans are now more concerned about civil liberties than about terrorism."