A container ship from China is docked at Massport's Conley Terminal in Boston on Friday, July 13, 2012. The U.S. trade deficit widened in August as exports fell to the lowest level in six months, a worrisome sign that a slowing global economy is cutting into demand for U.S. goods (AP Photo/Stephan Savoia)

Photo by: Stephan Savoia

A container ship from China is docked at Massport's Conley Terminal in Boston on Friday, July 13, 2012. The U.S. trade deficit widened in August as exports fell to the lowest level in six months, a worrisome sign that a slowing global economy is cutting into demand for U.S. goods (AP Photo/Stephan Savoia)