Bush Pledges to Work with New U.N. Chief.

Later, in a speech, Ban paid tribute to the United States as key to the creation of the United Nations. At the same time, though, he cautioned, "A constructive partnership between the U.S. and the U.N. cannot, and should not, advance at the expense of others."

"Every one of our members has the right to be heard, whatever the size of its population or its pocketbook," he said at the Center for Strategic and International Studies, a Washington think tank.

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