We believe that big nations should not bully smaller nations, and that the sovereignty of nations must be respected. And we have long urged that disputes be resolved peacefully, including through mechanisms like international arbitration.

Here at home, we will strengthen our defenses but not succumb to a siege mentality that sacrifices the open society and liberties and values that we cherish as Americans, because great and proud nations don't hunker down and hide behind walls of suspicion and mistrust.

But the question is, do we care enough? Do we care enough to keep standing up for the country that we know is possible, even if it's hard, and even if it's politically uncomfortable? Do we care enough to sustain the passion and the pressure to make our communities safer and our country safer? Do we care enough to do everything we can to spare other families the pain that is felt here today?

Religious freedom doesn't mean you can force others to live by your own beliefs

I find it hard to believe that my God would consign four-fifths of the world to hell. I can't imagine that my God would allow some little Hindu kid in India who never interacts with the Christian faith to somehow burn for all eternity. That's just not part of my religious makeup.

There's no doubt that I'm a better president now than when I first took office. This is not a job where there's a manual, and over time you get a better sense of what's important, what's not, how to see around corners and anticipate problems, as opposed to just managing problems once they've arrived.

I think sometimes Europe may take for granted the extraordinary progress that's been made over the last 40, 50 years. I recognize that sometimes there is great frustration that arises out of the euro zone or out of the EU.