FILE - In this Monday, Oct. 24, 2011 file photo, a man injured in the blast is treated at Kenyatta National Hospital after a grenade attack at a bus stop in Nairobi, Kenya. The Pentagon's Joint ... more 
FILE - In this Monday, Oct. 24, 2011 file photo, a man injured in the blast is treated at Kenyatta National Hospital after a grenade attack at a bus stop in Nairobi, Kenya. The Pentagon's Joint Improvised Explosive Device Defeat Organization (JIEDDO) says that bomb attacks in Nigeria, Kenya and Somalia became more frequent and deadly in 2011 as al-Qaida-affiliated terror groups used more sophisticated devices to kill more people with each explosion. (AP Photo/Khalil Senosi, File) less 
1 / 3
Associated Press | Photo By Khalil Senosi, File
Thu, Mar 15, 2012 8:17 AM EDT