TO GO WITH AFP STORY BY CELIA LEBUR Nigerian refugee children show their UNHCR wristband in a United Nations Refugee Agency refugee camp in Baga Sola by Lake Chad, which borders Chad, Nigeria, Niger and Cameroon, on January 26, 2015. Since the beginning of January more than 14,000 people have fled over the Nigerian border into Chad to escape the bloody attacks by Islamist group Boko Haram around Baga, according to Mamadou Dian Balde, of the UN's refugee agency. AFP PHOTO / SIA KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)
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