The latest wave of violence in Nigeria started after three churches were bombed on Sunday in Kaduna, a city which lies on the border between the Muslim north and the mostly Christian south. Boko Haram, the armed group that is opposed to Western ideology and which wants to establish an Islamic state in Nigeria, claimed responsibility for Sunday's suicide attacks. Although the group says it is trying to wipe out Western influence in the country, the attacks have a distinctly sectarian hue. Just how much of a threat is the Boko Haram to Nigeria? Guests: William Okoye, Alhaji Garba Sani, Buba Misawa.