When Edward Snowden revealed that Americans' phone calls and emails were being sucked up by government computers, the President called for a "national conversation." Yesterday, a former judge told the Privacy and Civil Liberties Oversight Board he was "frankly stunned" at what's now allowed by the secret court he once served on. How did the National Security Agency get so much power? Do the courts and the Congress understand the technology, let alone provide real supervision? We hear about constitutional rights and homeland security as the "national conversation" gets under way.