 The UAE is also the only country in the Middle East which has a US border preclearance that is staffed and operated by US Customs and Border Protection officers, allowing travelers to reach the US as domestic travelers.In 2013, The UAE spent more than any other country in the world to influence U.S. policy and shape domestic debate.In its dispute with the United States, Iran has repeatedly threatened to close the Strait of Hormuz, a vital oil-trade route.