[img]http://d.yimg.com/a/p/ap/20090917/capt.5d8c189130de4d708629e7a32d703454.somalia_fighting_xsa101.jpg?x=130&y=96&q=85&sig=Z2DxA311wh6mo8ZPyiblIA--[/img]AP - Islamic insurgents posing as U.N. personnel detonated suicide car bombs in an African Union peacekeeping base Thursday to avenge a U.S. commando raid that killed an al-Qaida operative.