U.S. President Barack Obama (R) holds a news conference with France's President Nicolas Sarkozy (L) and British Prime Minister Gordon Brown (C) at the G20 Summit in the Pittsburgh Convention Center in Pittsburgh, Pennsylvania, September 25, 2009.
U.S. President Barack Obama (L) and Britain's Prime Minister Gordon Brown speak during a bilateral meeting at the G20 Summit in Pittsburgh, Pennsylvania September 25, 2009.
PITTSBURGH - SEPTEMBER 25: Riot policemen block off a street after breaking up a protest against the G-20 Summit early on September 25, 2009 in Pittsburgh, Pennsylvania. Riot police with attack dogs turned out in force to quell the protest. U.S. President Barack Obama greeted world leaders the previous evening to kick off the two-day G-20 summit at Pittsburgh's convention center aimed at promoting global economic growth.
PITTSBURGH - SEPTEMBER 25: Riot police clear the streets after a protest against the G-20 Summit early on September 25, 2009 in Pittsburgh, Pennsylvania. Riot police with attack dogs turned out in force to quell the protest. U.S. President Barack Obama greeted world leaders the previous evening to kick off the two-day G-20 summit at Pittsburgh's convention center aimed at promoting global economic growth.
German Chancellor Angela Merkel, right, talks with Italy's Prime Minister Silvio Berlusconi at the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
South Korean President Lee Myung-bak, left, sits with South Korean Minister of Strategy and Finance Yoon Jeung-hyun during the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
President Barack Obama talks with Chinese President Hu Jintao, left, as other Chinese officials look on, at the morning plenary session of the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
Japan's Prime Minister Yukio Hatoyama, left, and Saudi Arabia's Foreign Minister Saud Al-Faisal take part in the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
Indonesia's President Susilo Bambang Yudhoyono, center, is seated with Indonesian Finance Minister Sri Mulyani Indrawati, right, as French President Nicolas Sarkozy talks with French official Xavier Musca at the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
CORAOPOLIS, PA - SEPTEMBER 24: Abhisit Vejjajiva, Prime Minister of Thailand, arrives for the G-20 Pittsburgh Summit at the Pittsburgh International Airport September 24, 2009 in Coraopolis, Pennsylvania. Heads of state from the world's leading economic powers are scheduled to arrive in Pittsburgh for the summit which takes place September 24 and 25.
US President Barack Obama (2ndL) and US First Lady Michelle Obama (R) welcome Thailand's Prime Minister Abhisit Vejjajiva (L) and his wife Pimpen Sakuntabhai to the G20 dinner at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania
PITTSBURGH - SEPTEMBER 24: A protestor cries from tear gas fired on marchers by riot police during an unpermitted march against the G-20 Summit on September 24, 2009 in Pittsburgh, Pennsylvania. Marchers gathered in neighborhoods several miles from Pittsburgh's downtown but were dispersed by police bearing tear gas and amplification machines. Dignitaries begin arriving for the G-20 Summit today while authorities vow to prevent expected protests from disrupting the meeting.credit photo: Reuters picture, AP photo
U.S. President Barack Obama (R) holds a news conference with France's President Nicolas Sarkozy (L) and British Prime Minister Gordon Brown (C) at the G20 Summit in the Pittsburgh Convention Center in Pittsburgh, Pennsylvania, September 25, 2009. 
U.S. President Barack Obama (L) and Britain's Prime Minister Gordon Brown speak during a bilateral meeting at the G20 Summit in Pittsburgh, Pennsylvania September 25, 2009.
PITTSBURGH - SEPTEMBER 25: Riot policemen block off a street after breaking up a protest against the G-20 Summit early on September 25, 2009 in Pittsburgh, Pennsylvania. Riot police with attack dogs turned out in force to quell the protest. U.S. President Barack Obama greeted world leaders the previous evening to kick off the two-day G-20 summit at Pittsburgh's convention center aimed at promoting global economic growth.
PITTSBURGH - SEPTEMBER 25: Riot police clear the streets after a protest against the G-20 Summit early on September 25, 2009 in Pittsburgh, Pennsylvania. Riot police with attack dogs turned out in force to quell the protest. U.S. President Barack Obama greeted world leaders the previous evening to kick off the two-day G-20 summit at Pittsburgh's convention center aimed at promoting global economic growth.
German Chancellor Angela Merkel, right, talks with Italy's Prime Minister Silvio Berlusconi at the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
South Korean President Lee Myung-bak, left, sits with South Korean Minister of Strategy and Finance Yoon Jeung-hyun during the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
President Barack Obama talks with Chinese President Hu Jintao, left, as other Chinese officials look on, at the morning plenary session of the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
Japan's Prime Minister Yukio Hatoyama, left, and Saudi Arabia's Foreign Minister Saud Al-Faisal take part in the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
Indonesia's President Susilo Bambang Yudhoyono, center, is seated with Indonesian Finance Minister Sri Mulyani Indrawati, right, as French President Nicolas Sarkozy talks with French official Xavier Musca at the start of the morning plenary session at the G-20 summit in Pittsburgh, Friday, Sept. 25, 2009.
CORAOPOLIS, PA - SEPTEMBER 24: Abhisit Vejjajiva, Prime Minister of Thailand, arrives for the G-20 Pittsburgh Summit at the Pittsburgh International Airport September 24, 2009 in Coraopolis, Pennsylvania. Heads of state from the world's leading economic powers are scheduled to arrive in Pittsburgh for the summit which takes place September 24 and 25.
US President Barack Obama (2ndL) and US First Lady Michelle Obama (R) welcome Thailand's Prime Minister Abhisit Vejjajiva (L) and his wife Pimpen Sakuntabhai to the G20 dinner at the Phipps Conservatory on September 24, 2009 in Pittsburgh, Pennsylvania
PITTSBURGH - SEPTEMBER 24: A protestor cries from tear gas fired on marchers by riot police during an unpermitted march against the G-20 Summit on September 24, 2009 in Pittsburgh, Pennsylvania. Marchers gathered in neighborhoods several miles from Pittsburgh's downtown but were dispersed by police bearing tear gas and amplification machines. Dignitaries begin arriving for the G-20 Summit today while authorities vow to prevent expected protests from disrupting the meeting.credit photo: Reuters picture, AP photo