Italian Prime Minister Silvio Berlusconi (R) and French President Nicolas Sarkozy arrive at the main conference hall of the G8 summit in l'Aquila, Italy, on July 8, 2009. Leaders of the G8 industrialized countries began their summit on Wednesday, with the world economic crisis and climate change at the top of their three-day agenda. [Xinhua]

US President Barack Obama (L) and British Prime Minister Gordon Brown arrive at the main conference hall of the G8 summit in l'Aquila, Italy, on July 8, 2009. Leaders of the G8 industrialized countries began their summit on Wednesday, with the world economic crisis and climate change at the top of their three-day agenda. [Xinhua]