Back in February, three U.S. service members were killed in Jordan, while more than 40 other soldiers were injured following a drone attack on a U.S. military base near the Syrian border. Oil markets only issued a muted response to the attack, with many analysts predicting that the administration was unlikely to cut off Iran’s key lifeline: oil exports. Experts pointed out that Washington would allow Iranian oil to continue flowing due to the risk of squeezing supply and triggering a politically damaging spike in world oil…