In this Nov. 16, 2012 photo, an employee works on assembly line at Generac Power Systems, Inc., in Whitewater, Wis. After U.S. manufacturing shrunk in November, it grew slowly in December and hiring increased, a sign of modest economic momentum heading into the new year. (AP Photo/Nam Y. Huh)

Associated Press
In this Nov. 16, 2012 photo, an employee works on assembly line at Generac Power Systems, Inc., in Whitewater, Wis. After U.S. manufacturing shrunk in November, it grew slowly in December and hiring increased, a sign of modest economic momentum heading into the new year. (AP Photo/Nam Y. Huh)
In this Nov. 16, 2012 photo, an employee works on assembly line at Generac Power Systems, Inc., in Whitewater, Wis. After U.S. manufacturing shrunk in November, it grew slowly in December and hiring increased, a sign of modest economic momentum heading into the new year. (AP Photo/Nam Y. Huh)
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