** FILE ** Nigerian President Goodluck Jonathan visits the police headquarters hit by a suicide bomber in Kano, Nigeria, on Sunday, Jan. 22, 2012. (AP Photo/Sunday Alamba)

Photo by: Sunday Alamba

** FILE ** Nigerian President Goodluck Jonathan visits the police headquarters hit by a suicide bomber in Kano, Nigeria, on Sunday, Jan. 22, 2012. (AP Photo/Sunday Alamba)