TOPSHOTS Nigerian troops inspect the former emir's palace that was used by Boko Haram as their headquarters but was burnt down when they fled Bama on March 25, 2015. Nigeria's military has retaken the northeastern town of Bama from Boko Haram, but signs of mass killings carried out by Boko Haram earlier this year remain Approximately 7,500 people have been displaced by the fighting in Bama and surrounding areas. AFP PHOTO / NICHOLE SOBECKI