Tomorrow President Obama heads to Italy for the opening of the G8 summit. He will meet with Pope Benedict, who has just issued a new encyclical calling for a new financial world order. In the paper, called "Charity in Truth," the Pope draws on traditional Catholic teaching in rebuking the profit-at-all-costs mentality of the global economy. Greed is a mortal sin, after all. For more, The Takeaway talks to David Willey, Rome correspondent for our partners the BBC.