A wintry sky hangs over the Federal Reserve Building in Washington January 22, 2008.  The U.S. Federal Reserve on Tuesday slashed U.S. interest rates by a hefty three-quarters of a percentage point, the biggest rate cut in more than 23 years, in an emergency bid to lend support to a U.S. economy some fear is on the verge of recession.  REUTERS/Kevin Lamarque  (UNITED STATES) - GM1DXCEYVGAA
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