NEW : the USS Mount Whitney cruise missiles strike four targets . NEW U.S. President Barack Obama confirmed that he had authorized `` limited military action in Libya '' and that `` that action has now begun . '' : They were fired from the United Kingdom and British ships and submarines . NEW : the Mediterranean Sea expects the U.S. portion of the military action to last weeks , an official says .
NEW : the USS Mount Whitney cruise missiles strike four targets . NEW : They were fired from the United Kingdom and British ships and submarines . NEW : the Mediterranean Sea expects the U.S. portion of the military action to last weeks , an official says .