U.S. President Barack Obama looks at the assembly of an engine as he tours the Daimler Detroit Diesel plant in Redford,

 
U.S. President Barack Obama looks at the assembly of an engine as he tours the Daimler Detroit Diesel plant in Redford,
U.S. President Barack Obama looks at the assembly of an engine as he tours the Daimler Detroit Diesel plant in Redford, Michigan, December 10, 2012. REUTERS/Jason Reed