I think at times of significant stress people are going to be looking for something and they don't always know exactly what it is that they're looking for and they may opt for change even if they're not entirely confident what that change will bring.

Time is running out for Iran to address the international community's growing concerns about its nuclear program.

No country can hide from the dangers of carbon pollution

I feel good when I'm engaged in what I think are the core issues of the society, and those core issues to me are what's happening to poor folks in this society.

We seem to have trouble with [critical thinking]. And our political system doesn't help.

I don't think I underestimated [Vladimir Putin], but I think that I underestimated the degree to which, in this new information age, it is possible for misinformation for cyber hacking and so forth to have an impact on our open societies, our open systems, to insinuate themselves into our democratic practices in ways that I think are accelerating.

Our intelligence agencies will continue to gather information about the intentions of governments - as opposed to ordinary citizens - around the world, in the same way that the intelligence services of every other nation does. We will not apologize simply because our services may be more effective.