US Democratic presidential candidate Sen Barack Obama shakes hands with supporters at the Wynnewood Station near Philadelphia Pennsylvania

 
US Democratic presidential candidate Sen Barack Obama shakes hands with supporters at the Wynnewood Station near Philadelphia Pennsylvania
US Democratic presidential candidate Sen. Barack Obama (D-IL) shakes hands with supporters at the Wynnewood Station near Philadelphia, Pennsylvania, April 19, 2008. REUTERS/Tim Shaffer (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)