Gaddafi also took part in the G8 summit in L'Aquila in July as Chairman of the African Union. During the summit a warm handshake between US President Barack Obama and Muammar Gaddafi took place (the first time the Libyan leader had been greeted by a serving US president). Later, at the summit's official dinner hosted by President Giorgio Napolitano, US and Libyan leaders upset protocol by sitting next to Italian Prime Minister and G8 host Berlusconi. (According to protocol, Gaddafi should have sat three places away from Berlusconi).