From last night's All Together Now, a Celebration of Service: There can be no definition of a successful life that does not include service to others.

The United States will continue its efforts to improve our understanding of climate change - to seek hard data, accurate models, and new ways to improve the science - and determine how best to meet these tremendous challenges.

Power can be very addictive, and it can be corrosive. And it's important for the media to call to account people who abuse their power, whether it be here or elsewhere.

The day will come - and it is not far off - when the legacy of Lincoln will finally be fulfilled at 1600 Pennsylvania Avenue, when a black man or woman will sit in the Oval Office. When that day comes, the most remarkable thing about it will be how naturally it occurs.

The anchor in our world today is freedom, holding us steady in times of change, a symbol of hope to all the world.

War is never cheap or easy.

We need an independent media to hold people like me to account.