Reuters
DES MOINES United States of America 5/21/2008
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US Democratic presidential candidate Senator Barack Obama (D-IL) waves to supporters, as he stands with his wife Michelle, after his speech at his Oregon and Kentucky primary election night rally in Des Moines, Iowa, May 20, 2008. REUTERS/John Gress (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)