The prospect of an all-out war in the Middle East increased after Iran launched a massive missile attack on Israel on October 1. Israel has threatened retaliation, fueling concerns of a disruption to the flow of oil and gas from the energy-rich region.Global oil prices have already soared 9 percent since Iran’s attack, which came amid Israel’s yearlong war in the Gaza Strip and its invasion of southern Lebanon earlier this month.A full-scale conflict between Israel and Iran could upend the international energy supply and send shock waves throughout…