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Iranian shopkeepers are taking part in protests as the currency hits a record low against the US dollar, and annual inflation is running at over 40 percent. Denmark’s national postal service is delivering its last letter today, bringing an end to four centuries of letter delivery by the state-owned firm PostNord. And, just before he retires, we say goodbye to Warren Buffett and look back at his career. Also how artificial intelligence is driving a shake up in the legal profession worldwide. Presenter: Leanna Byrne Producer: Ahmed Adan Editor: Justin Bones