U.S. President Obama walks past wall of engine blocks and completed engines during a tour of the Daimler Detroit Diesel plant in Redford

 
U.S. President Obama walks past wall of engine blocks and completed engines during a tour of the Daimler Detroit Diesel plant in Redford
U.S. President Barack Obama walks past a wall of engine blocks and completed engines during a tour of the Daimler Detroit Diesel plant in Redford, Michigan, December 10, 2012. REUTERS/Jason Reed