US Democratic presidential candidate and US Senator Barack Obama looks at a display on the US civil war and slavery at the Mapleton Expeditionary School of the Arts in Thornton

 
US Democratic presidential candidate and US Senator Barack Obama looks at a display on the US civil war and slavery at the Mapleton Expeditionary School of the Arts in Thornton
US Democratic presidential candidate and US Senator Barack Obama (D-IL) looks at a display on the US civil war and slavery at the Mapleton Expeditionary School of the Arts in Thornton, Colorado May 28, 2008. REUTERS/Rick Wilking (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)