Workers finish installing a billboard showing Kenya's President Uhuru Kenyatta and President Barack Obama in downtown Nairobi a day before Obama's visit. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

Kenyan graffiti artist Bankslave created a mural of Barack Obama. The president himself will visit Kenya on Friday. One of the president's agenda items is to promote solar power. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

A man in Nairobi, Kenya, stands in front of a mural of President Obama, created by the Kenyan graffiti artist Bankslave, ahead of Obama's trip to Kenya and Ethiopia. Ben Curtis/AP hide caption

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Traffic stands still in Nairobi. People in Kenya's capital don't like getting into cabs driven by strangers. They prefer to call drivers they know or who their friends recommend. Goran Tomasevic/Reuters/Landov hide caption

itoggle caption Goran Tomasevic/Reuters/Landov

Somali children dance in the Dadaab refugee camp in Kenya. Fairfax Media/Fairfax Media via Getty Images hide caption

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At the "Dinner in the Dark" restaurant that's just opened in Nairobi, a blind waiter leads guests to their table. The photo was taken during a training session — that's why the lights are on. Courtesy of is Eatout.co.ke hide caption

itoggle caption Courtesy of is Eatout.co.ke

An ancient stone tool unearthed at the excavation site near Kenya's Lake Turkana. It's not just the shape and sharp edges that suggest it was deliberately crafted, the researchers say, but also the dozens of stone flakes next to it that were part of the same kit. MPK-WTAP hide caption

itoggle caption MPK-WTAP

In the 1950s, the World Bank funded the creation of the world's largest man-made dam, the Kariba Dam, which sits on the border of Zimbabwe and Zambia. The construction of such dams can have dire consequences for poor people living near a river, an investigation found. Jekesai Njikizana/AFP/Getty Images hide caption

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In March, demonstrators in Nairobi demanded tougher punishment for assailants of women and girls. Anadolu Agency/Getty Images hide caption

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Students gather at a distance from the Garissa University College after an attack by gunmen in Garissa, Kenya, Thursday. The attack has injured dozens of people; a siege is ongoing. AP hide caption

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In The Shame In Venice 2, Kenyan artist Michael Soi protests the makeup of his country's pavilion at the Biennale. Courtesy of Michael Soi hide caption

itoggle caption Courtesy of Michael Soi