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This photo taken on June 17, 2014 in Dabanga, northern Cameroon, shows a convoy of Cameroon's army soldiers as part of a reinforcement of its military forces against Nigerian Islamist group Boko Haram. Boko Haram, which in April 2014 kidnapped more than 200 schoolgirls in northeast Nigeria to international condemnation, has been waging a brutal, five-year insurgency that has claimed thousands of lives. AFP PHOTO / REINNIER KAZE (Photo credit should read Reinnier KAZE/AFP/Getty Images)

This photo taken on June 17, 2014 in Dabanga, northern Cameroon, shows a convoy of Cameroon's army soldiers as part of a reinforcement of its military forces against Nigerian Islamist group Boko Haram. Boko Haram, which in April 2014 kidnapped more than 200 schoolgirls in northeast Nigeria to international condemnation, has been waging a brutal, five-year insurgency that has claimed thousands of lives. AFP PHOTO / REINNIER KAZE        (Photo credit should read Reinnier KAZE/AFP/Getty Images)