President Barack Obama and First Lady Michelle Obama arrive in Pittsburgh for the G20 Summit, held on Sept. 24 and 25, 2009.
The first night of the G-20, the President and First Lady hold a reception for visiting heads of state at the Phipps Conservatory and Botanical Gardens in Pittsburgh.
The Obamas share a moment in the midst of the meet-and-greet.
South African President Jacob Zuma and his wife Nompumelelo Ntuli chat with the Obamas during the opening dinner of the G20 on Sept. 24. The Obamas had their picture taken with all the heads of state who attended.
Italian Prime Minister Silvio Berlusconi greets First Lady Michelle Obama and President Barack Obama.
French President Nicolas Sarkozy and his wife Carla Bruni Sarkozy continue the cavalcade of heads of state featured in Pittsburgh.
Anarchist demonstrators gathered on Liberty Avenue in downtown Pittsburgh to protest the G20.
An officer emerges from a cloud of tear gas towards protesters, several of whom were arrested and charged with disturbing the peace. Thousands of police officers from across the country were brought in for security ahead of the summit.
Newscom/Guy Wathen/Pittsburgh Tribune-Review
At a press conference, Treasury Secretary Timothy Geithner says "We have a special responsibility here in the United States to make sure we are doing the things in this country to preserve confidence in the U.S. financial system -- confidence that's very important to sustain the dollar's role as the principle reserve currency in the international financial system."
Pres. Obama and First Lady Michelle arrive at the welcoming dinner for G-20 leaders at the Phipps Conservatory.
Newscom/Win McNamee/Pool/Sipa Press
Russian President Dmitry Medvedev and Obama exchange greetings at the start of a meeting.
Obama and Chinese President Hu Jintao gather around the meeting table for the first plenary session of the summit.
First Lady Michelle Obama co-hosts a dinner party at the home of Teresa Heinz Kerry for the spouses of the G20 leaders.
Newscom/Lawrence Jackson/White House/Sipa Press
Obama talks with Indian Prime Minister Dr. Manmohan Singh during a working dinner.
Newscom/Pete Souza/White House/Sipa Press
White House/Pete Souza
Obama, flanked by Sarkozy and British Prime Minister Gordon Brown, addresses the G20 on Iranian nuclear ambitions and reveal that intelligence has uncovered a secret underground enrichment program in Qom.
Newscom/Sidney Davis/ Pittsburgh Tribune-Review
The spouses of the visiting G-20 leaders pose for a family photo. (Shown Top row L-R), Filippa Reinfeldt, wife of Swedish Prime Minster Fredrik Reinfeldt, Laureen Harper of Canadian Prime Minister Stephen Harper, Sarah Brown, wife of British Prime Minister Gordon Brown, Miyuki Hatoyama, wife of Japanese Prime Minister Yukio Hatoyama, wife of UN Secretary-General Ban Ki-moon, Ban Soon Taek, and unknown. (Shown bottom row L-R) Margarita Zavala, Brazil's first lady Marisa Leticia Lula da Silva, First Lady Michelle Obama, Ani Bambang Yudhoyono, wife of Indonesia's President Susilo Bambang Yudhoyono, French President Nicolas Sarkozy's wife Carla Bruni Sarkozy, and wife of Russian President Dmitry Medvedev, Svetlana Medvedev.
The leaders of the G20 Summit -- from Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, United Kingdom and the U.S. -- pose for a family photo after the first plenary session of the summit.
G-20 leaders are working on an accord to prevent a repeat of the worst global financial crisis since the Great Depression.
Newscom/Pete Souza/UPI/Anatoli Zhdanov