In his Philadelphia speech on March 18th, Obama said that America can change, and that is the true genius of this nation.

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That's the true genius of America: that America can change.

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Everything I have seen of your generation has shown me that you believe, as deeply as any previous generation, that America can always change for the better.

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We all, I guess, will take one or two lines of the speech - I mean, he talks about the genius of America is that we can change, that we can improve.

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But they sense, deep in their bones, that with just a change in priorities, we can make sure that every child in America has a decent shot at life, and that the doors of opportunity remain open to all.

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Translating the blitzkrieg to corporate America, Warden preaches that bold-stroke planning can change whole markets.

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Assuming that these dangers can be avoided, how might the change in America's thinking affect the balance of its relations with the other two big powers, Russia and China?

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And unless America can make a success out of Iraq, investors fear that it will lack the credibility to press for ambitious change elsewhere.

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