FILE: This file image made available from Wednesday, Jan. 10, 2012, taken from video posted by Boko Haram sympathizers shows the leader of the radical Islamist sect Imam Abubakar Shekau. Shaking a ... more 
FILE: This file image made available from Wednesday, Jan. 10, 2012, taken from video posted by Boko Haram sympathizers shows the leader of the radical Islamist sect Imam Abubakar Shekau. Shaking a finger while cradling an assault rifle, the bearded leader of Nigeria’s extremist Islamic sect Abubakar Shekau threaten in a video on Saturday July 13, 2013 to burn down more schools and kill teachers. But he denies his fighters are killing children. (AP Photo, FIle ) THE ASSOCIATED PRESS CANNOT INDEPENDENTLY VERIFY THE CONTENT, DATE, LOCATION OR AUTHENTICITY OF THIS MATERIAL less 
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Associated Press
Sat, Jul 13, 2013 11:36 AM EDT