I think it's very important to remember that so much of the work that gets done between countries is not done at the level of presidents, but is done within various agencies, whether it's law enforcement or economic ministries. And when they establish relationships and systems of communications and shared projects and shared visions, those structures continue even after any particular president is gone. It builds trust and understanding between countries that are critically important.

Many of you know that I got my name, Barack, from my father. What you may not know is Barack is actually Swahili for 'That One.' And I got my middle name from somebody who obviously didn't think I'd ever run for president.

We have to find ways in which, collectively, we agree there's some things that government needs to do to help protect us, that in this age of non-state actors who can amass great power, I want my government - and I think the German people should want their government - to be able to find out if a terrorist organization has access to a weapon of mass destruction that might go off in the middle of Berlin.

We have concerns whenever we see people who have large stockpiles of weapons, or appear to be in the process of accumulating weapons and ammunition.

That window is closing. . . . Now, the clock is ticking. . . . We're not going to have these talks just drag out in a stalling process. . . . We haven't given away anything - other than the opportunity for us to negotiate

Politics in this country [USA] is always tough. It's always contentious, because this is a big country and a diverse country, and people have strong points of view, and we've got a great diversity of interests.

I think that today, faith drives so much of our politics, that I thought, "If you don't talk about it, you are missing a whole big part of what is going on politically."