President Obama shakes hands with Commerce Secretary Gary Locke as U.S. Trade Representative Ron Kirk looks on after Mr. Obama signed the Manufacturing Enhancement Act of 2010 in the East Room of the White House in Washington on Wednesday, Aug. 11, 2010. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

President Obama shakes hands with Commerce Secretary Gary Locke as U.S. Trade Representative Ron Kirk looks on after Mr. Obama signed the Manufacturing Enhancement Act of 2010 in the East Room of the White House in Washington on Wednesday, Aug. 11, 2010. (AP Photo/Charles Dharapak)