**FILE** A burnt-out school block in Potiskum, Nigeria, is seen here on Oct. 20, 2012, following a gun battle and explosions by the Boko Haram sect. (Associated Press)
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**FILE** A burnt-out school block in Potiskum, Nigeria, is seen here on Oct. 20, 2012, following a gun battle and explosions by the Boko Haram sect. (Associated Press)
