FILE-In this file photo taken from video released by Nigeria&#039;s Boko Haram terrorist network, Monday May 12, 2014, shows missing girls abducted from the northeastern town of Chibok. A teenage who surrendered before carrying out a suicide bombing attack in northern Cameroon has told authorities she was one of the 276 girls abducted from a Nigerian boarding school by Islamic extremists nearly two years ago, authorities said Saturday, March 26, 2016. (AP Photo)