G8 summit in L`Aquila , Italy. Pictured: l-r Japanese Prime Minister Taro Aso , Canadian Prime Minister Stephen Harper , U.S. President Barack Obama , French President Nicolas Sarkozy , Italian Prime Minister Silvio Berlusconi , Russian President Dmitry Medvedev , German Federal Chancellor Angela Merkel , British Prime Minister Gordon Brown , Swedish Prime Minister Fredrik Reinfeldt , currently holding the EU rotating presidency, and European Commission President José Manuel Barroso