Democratic presidential candidate Senator Barack Obama throws a bottle of water to the crowd during a campaign stop in Louisville

 
Democratic presidential candidate Senator Barack Obama throws a bottle of water to the crowd during a campaign stop in Louisville
Democratic presidential candidate Senator Barack Obama (D-IL) throws a bottle of water to the crowd during a campaign stop in Louisville, Kentucky, May 12, 2008. REUTERS/John Sommers II (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)