The wreckage of a hot air balloon and its gondola lay in a field near Luxor, Egypt, on Tuesday. A fire and subsequent crash killed many of those who were aboard the tourist flight. Reuters /Landov hide caption

itoggle caption Reuters /Landov

Kenyan authorities are trying to guard against fraud and violence when they hold a presidential election on March 4. Here, voters register on biometric equipment last December in Nairobi. Simon Maina/AFP/Getty Images hide caption

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People walk down a market street in Eastleigh, a predominantly Muslim Somali neighborhood in Nairobi, Kenya, in 2009. The neighborhood has come under scrutiny as the U.S. cracks down on terrorism financing. Spencer Platt/Getty Images hide caption

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A women's group protests Tuesday outside the courthouse in Pretoria, South Africa, where Oscar Pistorius was attending his bail hearing. Violence against women is widespread in South Africa, and was already part of the national debate before the Pistorius case. Waldo Swiegers/AP hide caption

itoggle caption Waldo Swiegers/AP

HIV drugs not only can keep patients healthy but also can stop the sexual transmission of the virus. Here an HIV-positive mother picks up medications at a hospital outside Johannesburg, South Africa. Alexander Joe/AFP/Getty Images hide caption

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Algerian police stop cars at a checkpoint in In Amenas, deep in the Sahara near the Libyan border, on Jan. 18. Islamists took hostages at a nearby gas field in a major international incident. Farouk Batiche/AFP/Getty Images hide caption

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Oscar Pistorius as he entered a court in Pretoria on Thursday. Mike Hutchings /Reuters /Landov hide caption

itoggle caption Mike Hutchings /Reuters /Landov