Today, we are closer to fulfilling America's promise of economic and social justice because we stand on the shoulders of giants like Dr. King, yet our future progress will depend on how we prepare our next generation of leaders. We must fortify their ladders of opportunity by correcting social injustice, breaking the cycle of poverty in struggling communities, and reinvesting in our schools. Education can unlock a child's potential and remains our strongest weapon against injustice and inequality.

Obviously, we've all had disagreements and differences in the past. I suspect we'll have them again in the future. But last night as Americans learned that the United States had carried out an operation that resulted in the capture and death of Osama bin Laden. I think we experienced the same sense of unity that prevailed on 9/11. We were reminded again that there is a pride in what this nation stands for. And what we can achieve that runs far deeper than party, far deeper than politics.

I think the Turks' willingness to take seriously action on the borders to stop the flow of foreign fighters joining ISIL is significant.

I think there are a lot of people who are involved in the Tea Party who have very real and sincere concerns about spending that's out of control or generally philosophically believe that the government should be less involved in certain aspects of American life rather than more involved. And they have every right and obligation as citizens to be involved and engaged in this process.

Unemployment is low, incomes are up, poverty is down - and that's going to be a lasting change.

More than a building that houses books and data, the library represents a window to a larger world, the place where we've always come to discover big ideas and profound concepts that help move the American story forward and the human story forward.

There are things I cannot say.