From Our Own Correspondent

Kate Adie presents stories from Ukraine, Nigeria, the US, Mexico and an archipelago in the Arctic Ocean. News this week of the discovery of another mass grave in the southern Ukrainian city of Mariupol has left families with missing relatives, fearing for their plight. And as media access has grown increasingly limited, understanding what really happened in Mariupol has become less clear. Hillary Anderson has spent much of the year trying to find out.In Nigeria, the case of Mubarak Bala, who was sentenced to 24 years in prison for blasphemy, has thrown into the spotlight the limits on freedom of expression. Across the country, atheists, face discrimination at work and even violence. Yemisi Adegoke followed Mubarak's case and learned what can happen to those who decide to live openly without faith.Residents of Jackson, Mississippi have long complained about their failing water system. And this summer, the crisis came to a head. Jackson’s residents were faced with dirty brown water coming from their taps, or no