American intelligence agencies have found increasing evidence that the broad outlines of the guerrilla campaign being waged against American forces in Iraq were laid down before the war by the Iraqi Intelligence Service, government officials said Friday. That view is based on interrogations of former senior Iraqi officials who are now in American custody and on documents found in Iraq, government officials said. They acknowledged that intelligence agencies had earlier underestimated the strength of the resistance and the degree to which it now appears to have reflected central planning and organization. Full Story