![Richard Ledgett: The NSA responds to Edward Snowden's TED Talk](https://pi.tedcdn.com/r/pe.tedcdn.com/images/ted/b4e45bc988d63a0f64d01146505700e1217f7845_1600x1200.jpg?h=200)
After a surprise appearance by Edward Snowden at TED2014, Chris Anderson said: "If the NSA wants to respond, please do." And yes, they did. Appearing by video, NSA deputy director Richard Ledgett answers Anderson's questions about the balance between security and protecting privacy.