But it will depend on young people like you being open to new ideas and new possibilities. And it will require young people like you never to stereotype or assume the worst about other people.

For the sake of our children and our future, we must do more to combat climate change.

We should never hesitate to use military force, and I will not, as president, in order to keep the American people safe. But we have to use our military wisely. And we did not use our military wisely in Iraq.

Cuba is actually one where I am more optimistic because of the unique nature of Cuba - 90 miles off our shore with a massive ex-patriot population, now Cuban-American population that still have deep links to the island. There I am more confident that over time that the winds of commerce and telecommunication and travel start shifting the nature of that regime. But that's a small country which has almost a unique relationship to us.

If we hope to give our children a chance, it's time we start giving our teachers a chance.

Germany, South Korea - these are all countries that are investing massively in education. We've got to do the same thing in America.

We, the people, still believe that our obligations as Americans are not just to ourselves, but to all posterity.