Black children, white children, Latino children. America is becoming more diverse, it's becoming more tolerant as a consequence there's more interactions between groups. There are going be tensions that arise.

[The White House staff] start bringing in their kids, who you think should be babies and now are in second grade or something, and you've watched them grow up. So I think what ends up happening is you end up maintaining those networks and those contacts, but the concentrated interactions and experience that you have here, I don't think, I don't expect you can duplicate anyplace else.

There are things I cannot say.

If war explodes in Sudan, it could have a destabilizing effect that creates more space for terrorist activity that could eventually be directed at our homeland.

I just want to go through Central Park and watch folks passing by. Spend the whole day watching people. I miss that.

The single biggest threat that we face is a nuclear weapon or some weapon of mass destruction. What that means is that we have to be extraordinarily aggressive and vigilant in controlling nuclear proliferation.

We have to recognize we've got some big problems on race, just like we got still big problems on crime, just like we got big problems on just about everything. But we also have to make sure that we've - draw confidence from the progress that we have made, 'cause otherwise, you get into this cycle of cynicism.