AP Photo/Charles Dharapak
President Barack Obama stands at his seat before the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Charles Dharapak
Treasury Secretary Timothy Geithner, right, talks with White House Chief of Staff Rahm Emanuel at the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/RIA Novosti
President Barack Obama speaks with Russian President Dmitry Medvedev, before the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Charles Dharapak
President Barack Obama meets with British Prime Minister Gordon brown at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Gerald Herbert
President Barack Obama, followed by British Prime Minister Gordon Brown, center, and French President Nicolas Sarkozy, arrive to make a statement on Iran's nuclear facility, Friday, Sept. 25, 2009, during the G-20 summit in Pittsburgh.
AP Photo/Carolyn Kaster
French President Nicolas Sarkozy, flanked by President Barack Obama, and British Prime Minister Gordon Brown, makes a statement on Iran's nuclear facility, Friday, Sept. 25, 2009,during the G-20 Summit in Pittsburgh.
AP Photo/Charles Dharapak
President Barack Obama, center, British Prime Minister Gordon Brown, right and French President Nicolas Sarkozy leave the stage after making a joint statement on Iran's nuclear facility, Friday, Sept. 25, 2009, during the G-20 summit in Pittsburgh.
AP Photo/Keith Srakocic
Germany Chancellor Angela Merkel, left, talks with Russia's President Dmitry Medvedev, at a meeting on the sideline of the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/The Canadian Press
Canadian Prime Minister Stephen Harper holds a joint news conference with South Korean President Lee Myung-bak at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Charles Dharapak
President Barack Obama and G-20 summit leaders pose for a group photo in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Charles Dharapak
G-20 leaders pose for a photograph at the summit on Sept. 25, 2009. From left to right: Indonesia's President Susilo Bambang Yudhoyono; German Chancellor Angela Merkel; Brazil's President Luiz Inacio Lula da Silva; British Prime Minister Gordon Brown; President Barack Obama; Turkey's Prime Minister Recep Tayyip Erdogan; China's President Hu Jintao; Indian Prime Minister Manmohan Singh; Mexico's President Felipe Calderon.
AP Photo/Carolyn Kaster
German Chancellor Angela Merkel and British Prime Minister Gordon Brown chat during a group photo session with G-20 leaders during the G-20 Summit, Friday, Sept. 25, 2009, in Pittsburgh.
AP Photo/Charles Dharapak
France's President Nicolas Sarkozy, center, stands with Indonesia's President Susilo Bambang Yudhoyono, right, and South Korea's President Lee Myung-bak during a group photo session at the G-20 summit hosted by President Barack Obama in Pittsburgh, Friday, Sept. 25, 2009.
AP Photo/Charles Dharapak
President Barack Obama and Chinese President Hu Jintao, center, shake hands during a group photo session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.