U.S. President Barack Obama (L) shakes hands with White House Chief of Staff Jacob Lew during a nomination ceremony in the East Room of the White House in Washington D.C., capital of the United States, Jan. 10, 2013. U.S. President Barack Obama on Thursday picked White House Chief of Staff Jacob Lew as the next Treasury Secretary succeeding Timothy Geithner, a big step of shaping his economic team. (Xinhua/Zhang Jun)