Stephen Sackur is in northern Italy for the annual discussion of global politics known as the Ambrosetti Forum. High on the agenda for many European politicians are the challenges posed by Vladimir Putin's Russia. Arkady Dvorkovich was until this spring Russia's Deputy Prime Minister. Amid the mutual suspicion and the sanctions, is there any way to avert deepening hostility between Russia and the West?Image: Arkady Dvorkovich (Credit: Reuters)