The Washington Post reports the U.S. military has set up small air bases across Africa to conduct surveillance of terrorist groups.
Report: US Expands Air Surveillance in Africa

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Fighters from Islamist group Ansar Dine stand guard as they prepare to hand over a Swiss female hostage in the desert outside Timbuktu, Mali, April 24, 2012.

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Suspected members of the radical Islamist sect Boko Haram are detained by the military in Bukavu Barracks in Kano state, Nigeria, March 21, 2012.