Blood stains the floor of the accident and emergency ward of the Nassarawa Specilist Hospital as victims of twin suicide blasts at Kano central mosque in northern Nigeria's largest city of Kano are treated on November 28, 2014. At least 120 people were killed and 270 others wounded when two suicide bombers blew themselves up and gunmen opened fire during weekly prayers at the mosque, a week after the emir of Kano, Muhammad Sanusi II, of one of Nigeria's top Islamic leaders called on northerners to defend themselves against Boko Haram Islamists tha have been carrying deadly attacks and seizure of territory in the northeast. AFP PHOTO / Aminu ABUBAKAR        (Photo credit should read AMINU ABUBAKAR/AFP/Getty Images)