I worry a bit about the unknowns when it comes to travelers to the war zones in Syria and Iraq. Who don't I see? And I worry about the people who may be in their basements radicalizing that I can't see.

We do assess that hostile actors gained access to the private commercial e-mail accounts of people with whom Secretary Clinton was in regular contact from her personal account.

The people of the FBI are sworn to protect both security and liberty. It isn't a question of conflict. We must care deeply about protecting liberty through due process of law, while also safeguarding the citizens we serve - in every investigation.

Hate crimes impact not just individuals but entire communities. When a family is attacked because of the color of their skin, it's not just the family that feels violated, but every resident of that neighborhood.

Technology has forever changed the world we live in. We're online, in one way or another, all day long. Our phones and computers have become reflections of our personalities, our interests, and our identities. They hold much that is important to us.