World Leaders Arrive at G20 (20 images)

U.S. President Barack Obama (R) and First Lady Michelle Obama arrive 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 David L. Lawrence Convention Center, aimed at promoting economic growth. UPI/Win McNamee/Pool

U.S. President Barack Obama (C) and U.S. first lady Michelle Obama (R) welcome Italian Prime Minister Silvio 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. UPI/Win McNamee/Pool

U.S. President Barack Obama (2nd L) welcomes French President Nicolas Sarkozy (L), as First Lady Michelle Obama (R) and Carla Sarkozy (2nd R) talk, at 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 David L. Lawrence Convention Center, aimed at promoting economic growth. UPI/Win McNamee/Pool

U.S. President Barack Obama (L) kisses French President Nicolas Sarkozy's wife Carla Bruni Sarkozy (C) while welcoming her to the opening dinner for G-20 leaders with U.S. first lady Michelle Obama 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. UPI/Win McNamee/Pool