Nigeria

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A young girl stands amid the burned ruins of Baga, Nigeria, on Sunday, April 21, 2013, in this image shot with a mobile phone. (AP Photo/Haruna Umar)

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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)

** FILE ** Armed Nigerian civil defense corps officials secure the area following an explosion at a gasoline pipeline at Arepo, in Ogun, Nigeria, on Thursday, Jan. 24, 2013. The gasoline pipeline runs through southwest Nigeria, and the attack is being seen as a worrying expansion to the unchecked thefts which have become an incredibly lucrative business for criminal gangs hitting the country's petroleum-based economy. (AP Photo/Sunday Alamba)

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Onlookers gather at the site of a warehouse explosion and fire in Lagos, Nigeria, on Wednesday, Dec. 26, 2012. (AP Photo/Jon Gambrell)

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Christian worshippers from Nigeria pray at the Church of Nativity, traditionally believed by Christians to be the birthplace of Jesus Christ, in the West Bank town of Bethlehem, Monday, Dec. 24, 2012. (AP Photo/Adel Hana)

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** FILE ** Soldiers stand guard outside St. Rita's Catholic Church following a suicide bombing in Kaduna, Nigeria, on Sunday, Oct. 28, 2012. (AP Photo)

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Burnt out school block following a gun battle and explosions by the Boko Haram sect in Potiskum, Nigeria, Saturday, Oct. 20 , 2012. A Chinese construction worker has been killed in a besieged city in Nigeria's northeast, an official said, exacerbating security concerns for foreign workers in Nigeria's violence-wracked northeast. (AP Photo/Adamu Adamu)