Barack Obama: “We can revitalize our Nuclear Non-Proliferation Treaty.”

Every president here today, as different as we are, has tried our best to uphold the values that John McCain and Mitt Romney believed in no less than I did.

It's a way to honor her trailblazing leadership, and inspire visitors to follow in her footsteps.

We’ve now fought a war, spent billions and billions of dollars, you know, put enormous strain on our military. A lot of people have died. And it feels like we’re back where we were before we started the war, except maybe a little bit worse…

And there’s no reason to suggest that we can’t get through this one either.