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As the conflict in Ukraine grows, Kiev is debating further possible sanctions, including the disruption of Russian gas exports to Europe. Could Russia or the EU afford that? We consider the options with Richard Mallison, an analyst at the UK research consultancy, Energy Aspects.

Also in the programme, a report from Calcutta on why Bengalis are turning away from Bollywood and western films and watching their own cinema instead. And our regular letter-writer, Jim Srodes, tells the surpising story of the day Janet Yellen, chairman of the Fed, personally offered him millions of dollars' worth of fiscal stimulus.