Bill, including my grandfather, helped build the most prosperous economy the world has ever known.

WHITEHOUSE: President Obama Speaks at the Associated Press Luncheon

That is why, from my first day in office, I have worked hard to build a stronger United Nations for a better world.

UN: Secretary-General

For the past 12 years, it has been my privilege to build upon the legacy of one of the single greatest "champions of change" that the world has ever known --Dr. Norman E.

WHITEHOUSE: A Nobel Prize for Food and Agriculture