Pakistani hospital staff treat a person injured in a suicide attack on Shiite mourners in Rawalpindi, Pakistan, on Wednesday, Nov. 21, 2012. (AP Photo/C.A. Hussain)

Photo by: C.A. Hussain

Pakistani hospital staff treat a person injured in a suicide attack on Shiite mourners in Rawalpindi, Pakistan, on Wednesday, Nov. 21, 2012. (AP Photo/C.A. Hussain)