Tehran directs its projectiles mainly at the bases that host 4,000 U.S. troops, and no Jordanian has died from Iranian strikes during the war. But Washington’s so-called security umbrella (dating from the 1950s) has had the unwanted side effects of air-raid sirens and occasional flight cancellations. “Although some have criticized it domestically, Jordan’s entire security architecture is built on its close relationship with the U.S. “Jordan is not part of this war and its people should not suffer its consequences,” the letter says. To its north lies Syria, emerging from almost 14 years of civil war, with sporadic violence and smuggling networks.