U.S. President Donald Trump pledged the U.S. would “massively blow up the entirety” of the world’s largest gas field if Iran attacks Qatar again. Trump made his threat on social media Wednesday night against Iran’s South Pars natural gas field after Iranian missiles hit Qatar. The Iranian attack was in retaliation for an Israeli attack on the South Pars field earlier Wednesday. The U.S.-Israeli war with Iran has roiled energy markets as the conflict escalates pressure on the region’s energy sector. The price of oil has surged on international markets, increasing the cost of gasoline and other goods while squeezing the global economy.