President Barack Obama and first lady Michelle Obama greet China's President Hu Jintao upon his arrival at the North Portico of the White House in Washington, Wednesday, Jan. 19, 2011. (AP Photo/Pablo Martinez Monsivais)

Photo by: Pablo Martinez Monsivais

President Barack Obama and first lady Michelle Obama greet China's President Hu Jintao upon his arrival at the North Portico of the White House in Washington, Wednesday, Jan. 19, 2011. (AP Photo/Pablo Martinez Monsivais)