An arrow placed on the stage shows the way to supporters as U.S. Democratic presidential candidate Senator...
An arrow placed on the stage shows the way to the supporters as U.S. Democratic presidential candidate Senator Barack Obama (D-IL) takes part in a town hall-style meeting at Troy High School in suburban Detroit June 2, 2008. The United States will hold its final democratic primaries in South Dakota and Montana on June 3. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)