Prison staff members stand outside the partly scorched exterior of the central prison in the northern Nigerian city of Bauchi on September 8, 2010. About 200 heavily armed members of the Boko Haram Islamist sect stormed the prison and freed 173 of their comrades awaiting trial for alleged involvement in the July 2009 insurrection that the group launched in its doomed bid to establish an Islamic state. Four people, including a soldier and a policeman, were killed in the attack while three prison guards were injured. A total of 721 inmates were freed by the attackers although 127 have returned of their own volition. The police succeeded in arresting 11 of the suspected attackers. AFP PHOTO/Aminu ABUBAKAR (Photo credit should read AMINU ABUBAKAR/AFP via Getty Images)