PITTSBURGH - SEPTEMBER 25:  U.S. President Barack Obama (C) shakes hands with Chinese President Hujin Tao (2nd-R) after posing for the official group photo at the G-20 as (third row-L-R) Director General of the ILO Juan Somavia, UN Secretary General Ban Ki-moon, World Bank President Robert Zoellick, OECD Secretary General Angel Gurria (second row-L-R) German Chancellor Angela Merkel, British Prime Minister Gordon Brown, Turkish Prime Minister Recep Tayyip Erdogan, Indian Prime Minister Manmohan Singh, Dutch Prime Minister Jan Peter Balkenende, (front) Indonesian President Susilo Bambang Yudhoyono (L), Brazilian President Luiz Inacio Lula da Silva (2nd-L) and Mexican President Felipe Calderon Hinojosa (R) look 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 (C) shakes hands with Chinese President Hujin Tao (2nd-R) after posing for the official group photo at the G-20 as (third row-L-R) Director General of the ILO Juan Somavia, UN Secretary General Ban Ki-moon, World Bank President Robert Zoellick, OECD Secretary General Angel Gurria (second row-L-R) German Chancellor Angela Merkel, British Prime Minister Gordon Brown, Turkish Prime Minister Recep Tayyip Erdogan, Indian Prime Minister Manmohan Singh, Dutch Prime Minister Jan Peter Balkenende, (front) Indonesian President Susilo Bambang Yudhoyono (L), Brazilian President Luiz Inacio Lula da Silva (2nd-L) and Mexican President Felipe Calderon Hinojosa (R) look 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.