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Mamadou Ka greets children near his family home after being repatriated last month from Gabon, in Dakar, Senegal, September 2, 2015. The plight of African migrants struggling to reach Europe, alongside thousands fleeing violence in the Middle East, has stirred international alarm this year, with hundreds dying at sea on the perilous Mediterranean crossing. But the majority of Africans who emigrate remain within Africa. Yet, amid rising concerns over the spread of Islamist militant groups on the continent and several economies hit by a slump in commodities prices, some African nations are clamping down on those migration flows. (Photo by Makini Brice/Reuters)
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