Nigeria appoints new defence minister to fight Boko Haram
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Nigeria's President Goodluck Jonathan shuffled his cabinet this week after a number of defections from his People's Democratic Party (PDP). General Aliyu Mohammed Gusau, a former military intelligence officer, has been appointed defence minister, as alleged Boko Haram attacks in Borno state escalate. Sebastian Spio-Garbrah, a Nigeria expert, comments.