The blast last November killed three Somalis and grievously wounded an American: Michael Goodboe, 54, a C.I.A. But one man escaped, sprinted to an explosives-filled vehicle primed for a suicide bombing, and hit the detonator. The vehicles halted at a seaside village where American and Somali paramilitaries poured out, storming a house and killing several militants, Somali officials said. convoy rolled out of Mogadishu in the dead of night, headed south along a crumbling ocean road that led deep into territory controlled by Al Shabab, one of Africa’s deadliest militant groups.
