Gangs have kidnapped students and staff at gunpoint across northern Nigeria, and killed some of their victims. What do the gunmen want? And how can they be stopped? Show more
Discover 11,128,835 listings and 277,944 playable programmes from the BBC
Gangs have kidnapped students and staff at gunpoint across northern Nigeria, and killed some of their victims. What do the gunmen want? And how can they be stopped? Show more