An urban farmer waters his plants near Bamako, Mali, where the government has set aside nearly 250 acres for market gardens. donkeycart/Flickr hide caption

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A mine worker sings and dances during a gathering at the Lonmin Platinum Mine near Rustenburg, South Africa, on Wednesday. Some 270 miners were charged with murder Thursday in connection with the deaths of 34 of their striking colleagues. Themba Hadebe/AP hide caption

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Gambian President Yahya Jammeh says all 47 death-row inmates will be executed by mid-September. Nine were killed this week by firing squad. Gambia's human rights record has frequently come under criticism during the 18 years of rule by Jammeh, shown here attending the African Union summit last month in Ethiopia. Simon Maina/AFP/Getty Images hide caption

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Bundles of Somaliland's own currency bills are laid out by a money-changer on a street in Hargeisa, capital of the unrecognized breakaway republic of Somaliland in northwestern Somalia. Investors are beginning to move into the untapped market in Somaliland, a stable island in a turbulent region. Kyodo/Landov hide caption

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Families wait for hours to register at the Yida refugee camp in South Sudan along the northern border in early July. Within a few weeks, the population of the camp more than doubled, leading to shortages of food, water and medicine. Paula Bronstein/Getty Images hide caption

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Uganda's Stephen Kiprotich wins the gold medal in the men's marathon at the 2012 London Olympics. As the impoverished country's second gold medalist in 40 years, Kiprotich became an instant national hero. Kyodo/Landov hide caption

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