Dutch peacekeepers sit at their military base in Gao, Mali
Dutch peacekeepers sit at their military base in Gao, Mali, August 11, 2015. The United Nations has deployed 10,000 peacekeepers and poured more than $1 billion into Mali but its efforts to end a three-year conflict are threatened by the reemergence of a centuries-old rivalry between Tuareg clans. Picture taken August 11. To match Insight MALI-VIOLENCE/MILITIA REUTERS/Emma Farge