Sarah Montague talks to Louka Katseli, former minister and chair of the National Bank of Greece. The Greek prime minister started the year with an optimistic message: 2016 would be a year of 'recovery and regrouping' and the 'tough period of crisis' for the country was over. Whether he was right will depend in part on Greece's banks; they are sitting on bad debts worth 100 billion euros and they still cannot let customers freely withdraw their money because of fears of a bank run. So is the prime minister right? Is the worst over for Greece?