The Euro - spreading contagion?

With Greece rudderless, France socialist and Spain penniless it seems the Eurozone is well and truely back in crisis mode. But how worried should the rest of the world be? That's what Justin Rowlatt and his guests are chewing over this week. He's joined by Elsie Kanza, Director, Head of Africa from the World Economic Forum, by Sangamitra Bandyopadhyay of the University of London, Andrew Norton of the Overseas Development Institute and Goolam Ballim of Standard Bank in South Africa.