Michael Amoah speaks to Al Jazeera about Nigeria's Boko Haram

In Nigeria, a recent string of attacks against Christian targets has been linked to the radical Islamist group Boko Haram. <br /><br />The group is fighting to overthrow the country's government and impose Islamic law.<br /><br />Michael Amoah, an Africa analyst and author at the London School of Economics, spoke to Al Jazeera about the group.