The Israelis had help—from the United States, the U.K, and, remarkably, Jordan, its Arab neighbor, with which relations have sharply deteriorated since the war in Gaza began. Early on Sunday morning, Jordan’s military shot down several drones and cruise missiles that had crossed into its airspace on the way to Israel. Less conspicuously, American radar and tracking systems arrayed across the Middle East, some of them in Arab countries that don’t often advertise their partnership with Israel, helped intercept Iran’s drones and missiles. “It’s an integrated system, built across the region,’’ Andrew Tabler, who served on President Donald Trump’s National Security Council and is a senior fellow at the Washington Institute for Near East Policy, told me. “Everybody played their part.”