It was basic research in the photoelectric field-in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago.

That's when America soars, when we look out for one another and we take care of each other, when we root for one another's success, when we strive to do better and to be better than the generation that came before us and try to build something better for generations to come, that's why we do what we do. That's the whole point of public service.

I've said many times around the world that like any government, like any country, like, any set of human institutions, we have our flaws. We've operated imperfectly. There are times we've made mistakes.

There are some who question the scale of our ambitions, who suggest that our system cannot tolerate too many big plans. Their memories are short, for they have forgotten what this country has already done, what free men and women can achieve when imagination is joined to common purpose, and necessity to courage.

Fourth, we will continue providing humanitarian assistance to innocent civilians who have been displaced by this terrorist organization. This includes Sunni and Shia Muslims who are at grave risk, as well as tens of thousands of Christians and other religious minorities. We cannot allow these communities to be driven from their ancient homelands.

Americans should tremble before suggesting that any fellow citizen lacks patriotism.

When I came into office, the world was divided. Iran was resurgent. Iran is at its weakest point, economically, strategically, militarily, then since - then in many years. And we are going to continue to keep the pressure on to make sure that they do not get a nuclear weapon. That's in America's national interest and that will be the case so long as I'm president.