Second. we have an interest in preventing the disorder and sectarian violence in Iraql from upsetting wider regional stability. The consequences of turmoil that draws neighboring states into a regional war could be grave. Such turmoil could topple friendly governments. expand destabilizing refugee flows. close the Persian Gulf to shipping traffic. or destroy key oil production or transportation facilities. thus diminishing the flow of oil from the region with disastrous results for the world economy. Third. we have an interest in preventing Iranian domination of the region. The fall of Saddam Husseins Sunni government opened up opportunities for Iran to seek much greater influence in Iraq and in the broader Middle East.