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UNITED STATES - MAY 3: Former Fed chairman Alan Greenspan stands outside of the U.S. Capitol on Independence Avenue waiting for his ride on May 3, 2011. (Photo By Bill Clark/Roll Call)

UNITED STATES - MAY 3: Former Fed chairman Alan Greenspan stands outside of the U.S. Capitol on Independence Avenue waiting for his ride on May 3, 2011. (Photo By Bill Clark/Roll Call)

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