Until this weekend, the roughly 45,000 U.S. troops based in the Middle East were able to insulate themselves from the chaos of the region. Granted, American service members in Iraq and Syria have been attacked more than 150 times by Iran-backed militias since October, but none of those attacks resulted in fatalities thanks to a combination of luck and antimissile defenses. That all changed Sunday, when President Joe Biden broke the news that a drone attack on living quarters had killed three Americans and wounded more than 30. The attack occurred in northeastern Jordan, a stone’s throw from th…