The Badjao are a tribe of nomadic sea dwellers who have lived off the shore of northeast Borneo for more than 200 years. They are a stateless people with no nationality in the traditional sense, residing in boats and living off the sea.
For sheer cruelty, they are well matched. They also share an apocalyptic "end-of-days" vision. Now there are signs that Boko Haram -- the most feared group in West Africa -- may be edging toward a formal pledge of allegiance to ISIS.