PITTSBURGH - SEPTEMBER 25:  U.S. President Barack Obama and his chief of staff Rahm Emanuel (L) speak prior to the plenary session of the G-20 summit on September 25, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers are meeting for the second day of the G-20 summit held at the David L. Lawrence Convention Center, aimed at promoting economic growth. Getty Images logo Getty Images 29 months ago

PITTSBURGH - SEPTEMBER 25: U.S. President Barack Obama and his chief of staff Rahm Emanuel (L) speak prior to the plenary session of the G-20 summit on September 25, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers are meeting for the second day of the G-20 summit held at the David L. Lawrence Convention Center, aimed at promoting economic growth.