I don't have much patience for anyone who denies that this challenge is real.

As we keep up the pressure, our air campaign will continue to hit ISIL harder than ever.

We have Jews, Muslims, Hindus, atheists, agnostics, Buddhists, and their own path to grace is one that we have to revere and respect as much as our own

If some of these [Republican] folks were around when Columbus set sail, they must have been founding members of the 'flat earth society.' They would not believe that the world was round.

I think that there is a particular mindset that was on display in the run-up to the Iraq war that continues to this day. Some of the folks who were involved in that decision either don't remember what they said or are entirely unapologetic about the results, but that views the Middle East as a place where force and intimidation will deliver on the security interests that we have, and that it is not possible for us to at least test the possibility of diplomacy.

It's particularly important that we reach out to everybody in our countries, those who feel disaffected, those who feel left behind by globalization and address their concerns in constructive ways as opposed to more destructive ways.

Scientists and engineers ought to stand side by side with athletes and entertainers as role models.