Nigeria

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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)

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Communications-tower equipment partially destroyed by Boko Haram is pictured in Maiduguri, Nigeria, on Friday, Sept. 7, 2012. (AP Photo/Haruna Umar)

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The remains of a car used in a suicide bombing sit outside a church in Bauchi, Nigeria, on Sunday, Sept. 23, 2012. The attack killed two people and wounded another 45, officials said. (AP Photo)

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CORRECTS NAME OF OSHOALA - Morgan Brian (6) of the U.S., celebrates with teammate Maya Hayes after scoring her team's first goal against Nigeria during their semifinal soccer match of the U-20 women's World Cup in Tokyo, Tuesday, Sept. 4, 2012. At left is Nigeria's Josephine Chukwunonye (15), and Asisat Oshoala at right. (AP Photo/Shizuo Kambayashi)