We do want people to know if in fact we learn of an incident that's focused on a particular city.If we learn of long-term planning, that's focused on a particular industry or infrastructure. And so we feel we have an obligation to let people know if we have information of a credible threat or not.

The United States has been enriched by Muslim Americans. Many other Americans have Muslims in their families or have lived in a Muslim-majority country - I know, because I am one of them.

I have been to this point unwilling to sign on to same-sex marriage primarily because of my understandings of the traditional definitions of marriage. But I also think you're right that attitudes evolve, including mine.

I've sought a constructive relationship with Russia, but what I have also been is realistic in recognizing that there is some significant differences in how Russia views the world and how we view the world.

Imagine if you had genuine, high-quality early-childhood education for every child, and suddenly every black child in America - but also every poor white child or Latino [child], but just stick with every black child in America - is getting a really good education. And they're graduating from high school at the same rates that whites are, and they are going to college at the same rates that whites are, and they are able to afford college at the same rates because the government has universal programs. So now they're all graduating.

Pastor Saeed Abedini is coming home. Held for three and a half years, his unyielding faith has inspired people around the world in the global fight to uphold freedom of religion. Now Pastor Abedini will return to his church and community in Idaho.

If, technologically, it is possible to make an impenetrable device or system where the encryption is so strong that there's no key - there's no door at all - then how do we apprehend the child pornographer? How do we solve or disrupt a terrorist plot?