Half of the devices that we encounter in terrorism cases, in counterintelligence cases, in gang cases, in child pornography cases, cannot be opened with any technique. That is a big problem. And so the shadow continues to fall.

We have no basis to conclude she [Hillary Clinton] lied to the FBI.

The lawyers doing the sorting for Secretary Clinton in 2014 did not individually read the content of all of her e-mails, as we did for those available to us; instead, they relied on header information and used search terms to try to find all work-related e-mails among the reportedly more than 60,000 total e-mails remaining on Secretary Clinton’s personal system in 2014.

Our process inside the United States government has gotten much better at making sure we touch all possible source of information about a refugee. The interview process has gotten more robust, so we've gotten our act together in that respect. The challenge remains, especially with respect to folks coming from Syria, we're unlikely to have anything in our holdings. That is, with people coming from Iraq, the United States government was there for a very long period of time. We had biometrics, we had source information. We're unlikely to have that kind of picture about someone coming from Syria.

We all love privacy. We all care about public safety. And none of - at least people that I hang around with, none of us want back doors. We don't want access to devices built-in in some way.

What we want to work with manufacturers on is to figure out how can we accommodate both interests in a sensible way? How can we optimize the privacy, security features of their devices and allow court orders to be complied with?

Half of the devices that we encounter in terrorism cases, in counterintelligence cases, in gang cases, in child pornography cases, cannot be opened with any technique. That is a big problem. And so the shadow continues to fall.