US President Barack Obama arrives to deliver a statement about the discovery of an undeclared nuclear site in Iran from the David L. Lawrence Convention Center in Pittsburgh, Pennsylvania, USA on the second day of the G20 Summit 25 September, 2009. EPA/MICHAEL REYNOLDS
US President Barack Obama (C) and British Prime Minister Gordon Brown (R) listen as French President Nicolas Sarkozy (L) delivers a statement about the discovery of an undeclared nuclear site in Iran from the David L. Lawrence Convention Center in Pittsburgh, Pennsylvania, USA on the second day of the G20 Summit 25 September, 2009. EPA/SHAWN THEW
(L-R) French President Nicolas Sarkozy, US President Barack Obama and British Prime Minister Gordon Brown leave the stage together after delivering a statement about the discovery of an undeclared nuclear site in Iran from the David L. Lawrence Convention Center in Pittsburgh, Pennsylvania, USA on the second day of the G20 Summit 25 September, 2009. EPA/MICHAEL REYNOLDS
German Chancellor Angela Merkel (L) and Russian President Dmitry Medvedev arrive for a photo op following their bilateral meeting at the Omni William Penn Hotel in Pittsburgh, Pennsylvania, USA on the second day of the G20 Summit 25 September, 2009. EPA/MATTHEW CAVANAUGH
U.S. President Barack Obama (C) and U.S. first lady Michelle Obama (R) welcome Italian Prime Minister Silvia Berlusconi to the welcoming dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
U.S. President Barack Obama (2L) and U.S. first lady Michelle Obama (R) welcome British Prime Minister Gordon Brown (2R) and his wife Sarah Brown to the welcoming dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
U.S. President Barack Obama (2L) and U.S. first lady Michelle Obama (R) welcome Russian President Dmitry Medvedev (L) and his wife Svetlana Medvedeva before the welcoming dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
U.S. President Barack Obama (R) escorts Japanese Prime Minister Yukio Hatoyama while welcoming him to the opening dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
U.S. President Barack Obama (R) escorts Japanese Prime Minister Yukio Hatoyama while welcoming him to the opening dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
French President Nicolas Sarkozy (R) arrives with his wife Carla Bruni Sarkozy to the welcoming dinner for G-20 leaders at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania. Heads of state from the world's leading economic powers arrived today for the two-day G-20 summit held at the David L. Lawrence Convention Center aimed at promoting economic growth. EPA/Win McNamee/POOL AFP OUT
Thai Prime Minister Abhisit Vejjajiva (L) and his wife Pimpen Sakuntabhai (R) arrive for a welcome ceremony at the Phipps Conservatory in Pittsburgh, Pennsylvania, USA on the first day of the G20 Summit 24 September, 2009. EPA/MATTHEW CAVANAUGH
Chinese President Hu Jintao (L) is greeted by US President Barack Obama (C) and his wife Michelle Oabama (R) as he arrives for a welcome ceremony at the Phipps Conservatory in Pittsburgh, Pennsylvania, USA on the first day of the G20 Summit 24 September, 2009. EPA/MATTHEW CAVANAUGH