The group was pushed out of Mogadishu by African peacekeeping forces in 2011 but has waged a series of gun and grenade attacks to try to overthrow the government and impose its strict version of sharia law. Caption: A Somali police officer (R) arrests a suspected rebel member (L) of al Shabaab among beach goers at the Lido beach north of Somalia's capital Mogadishu, March 23, 2012. (Photo by Feisal Omar/Reuters)
