Unthinkable Loss

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Four years since the so-called Islamic State swept through northern Iraq and carried out what the UN called a genocidal attack on the Yazidi people who lived there, Lyse Doucet returns to see what remains. Linda Pressly meets a Chilean woman who posed as a young boy online in her quest to get the police and the Catholic Church to investigate allegations of abuse in the priesthood. Gabriel Gatehouse has a mysterious but revealing encounter with a real-life troll in Stockholm, as he tries to explain the rise of nationalism in supposedly liberal Sweden. And Chris Robinson discovers why an increasing number of men are travelling to Istanbul to undergo hair transplant surgery. Photo: Ruined buildings in the town of Kojo, northern Iraq, formerly a majority-Yazidi area. (c) BBC News