The dispute pitting law enforcement against cyber security is dividing members of Congress — and veterans of US intelligence. FBI Director James Comey went to Capitol Hill this week to explain his demand that Apple provide a so-called "back door" to the iPhone of the San Bernardino terrorist Sayed Farook. One surprising opponent is retired General Michael Hayden, who led the CIA and directed the National Security Agency's wiretaps without warrants. He's now a security consultant in the private sector, and he's siding with Silicon Valley against the FBI. We also hear why so-called "back doors" to encryption are not just an issue of an individual's right to privacy but a real danger to American security.