The eurozone's economic problems are never far from the headlines. Portugal, which is already on the periphery of Europe, is perhaps drifting further after the constitutional court blocked some of its reforms. The country faces legal challenges to meeting its agreement with the International Monetary Fund (IMF). This week, Counting the Cost goes behind the numbers to look at the real hurdles Lisbon is facing, as it tries to keep the country's deal with the IMF on track.