Nigeria Violence

FILE- In this Sunday, May 11, 2014 file photo, people stand outside burnt houses following an attack by Islamic militants in Gambaru, Nigeria. Thousands of members of Nigeria’s home-grown Islamic extremist Boko Haram group strike across the border in Cameroon, with coordinated attacks on border towns, a troop convoy and a major barracks. Further north, Boko Haram employs recruits from Chad to enforce its control in northeastern Nigerian towns and cities. In Niger, the government has declared a “humanitarian crisis” and appealed for international aid to help tens of thousands of Nigerian refugees driven from their homes by the insurgency. (AP Photo/Jossy Ola, File)