No development strategy can be based only upon what comes out of the ground, nor can it be sustained while young people are out of work.

We want to see the Iranians engage, and as you know, we have attempted to bring about that engagement over the course of the last three-plus years. It has not proven effective.

America’s possibilities are limitless, for we possess all the qualities that this world without boundaries demands: youth and drive; diversity and openness; an endless capacity for risk and a gift for reinvention. My fellow Americans, we are made for this moment, and we will seize it - so long as we seize it together.

I can think about what [Mahatma] Gandhi said or [Martin Luther] King said about violence begetting violence, and still be true to my job by asking myself the question whenever we're confronted with a situation where some may be arguing for military action: Will this actually result in America being safer, or the most lives being saved?

Our combat mission is ending, but our commitment to Iraq's future is not.

Climate change constitutes a serious threat to global security.

Steve was among the greatest of American innovators - brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it...The world has lost a visionary. And there may be no greater tribute to Steve's success than the fact that much of the world learned of his passing on a device he invented.