Barack Obama: “In 10 years, we're going to eliminate the need for oil from the entire Middle East and Venezuela, all of it.”

helped lead some of the most significant movements for change in human history

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.

I think when you understand the complexities of America and the contradictions of America, I don’t think it makes you love it less. I think it makes you love it more.

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.