US airport security weighs major changes 25 years after 9/11
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American airports dramatically changed in the wake of 9/11, but new policy changes are restoring some previously banned travel practices after 25 years.
9/11 事件后，美国机场发生了巨大变化，但新的政策变化正在恢复一些 25 年后禁止的旅行行为。
The Transportation Security Administration (TSA) announced that it will soon allow individuals without tickets to pass through security and go to airport gates with loved ones.
美国运输安全管理局（TSA）宣布，很快将允许无票个人与亲人一起通过安检并前往机场登机口。
TSA is also considering allowing some US passengers to take full water bottles through security, reversing a policy that was implemented after a foiled 2006 terror plot.
TSA 还考虑允许一些美国乘客携带装满水的瓶子通过安检，扭转了 2006 年挫败恐怖阴谋后实施的政策。
The changes represent some of the biggest shifts in aviation security in decades and likely stem from improved technology rather than a decline in standards, an aviation expert told the BBC.
一位航空专家告诉英国广播公司，这些变化代表了几十年来航空安全领域最大的一些变化，很可能源于技术的改进，而不是标准的下降。
Americans who participate in TSA PreCheck or have a known traveller number will be the first to take advantage of the new policies. Those travellers already go through a pre-approval process with the US government in order to receive speedier security screening at US airports.
参加 TSA PreCheck 或知道旅客号码的美国人将最先享受新政策。 这些旅客已经通过了美国政府的预先批准程序，以便在美国机场接受更快的安全检查。
Individuals who have TSA PreCheck and want to go to an airport gate without a ticket can apply online one to three days before their planned visits.
拥有 TSA PreCheck 且想要无票前往机场登机口的个人可以在计划出行前一到三天在线申请。
TSA announced this week that the Gateside TSA PreCheck programme will be offered at 13 airports across the US.
TSA 本周宣布，将在美国 13 个机场提供 Gateside TSA 预检查计划。
"This new program makes it easier to return to the gate for welcomes and send-offs, meet friends during a layover, and enjoy dining and shopping along the way, bringing back the moments that once defined air travel," TSA wrote on its website.
TSA 在其网站上写道：“这项新计划使返回登机口接受欢迎和送机、在中转期间与朋友会面以及沿途享受餐饮和购物变得更加容易，带回了曾经定义航空旅行的时刻。”
Jeff Price, an aviation security expert and professor at Metro State University Denver, told the BBC that the post-9/11 policy change was about reducing the number of people security officers had to screen.
航空安全专家、丹佛都会州立大学教授杰夫·普赖斯 (Jeff Price) 告诉 BBC，9/11 事件后的政策变化是为了减少安全官员必须检查的人数。
"It keeps the lines moving and allows us to focus more on the traveling passenger," he said.
“它使线路保持畅通，让我们能够更多地关注出行乘客，”他说。
But now improvements in technology mean these policies can change, he said.
但现在技术的进步意味着这些政策可以改变，他说。
In addition to reinstating gate visitors, the Trump administration is also looking at allowing passengers with TSA PreCheck to take water with them through airport security, according to US media reports.
据美国媒体报道，除了恢复登机口访客外，特朗普政府还考虑允许持有 TSA PreCheck 的乘客携带水通过机场安检。
That would reverse a ban put in place following attempted terrorist attacks in the UK in 2006, in which individuals planned to smuggle liquid chemical mixtures inside soft drink and sports drink bottles.
这将推翻2006年英国未遂恐怖袭击后实施的禁令，当时有人计划在软饮料和运动饮料瓶中走私液体化学混合物。
The BBC requested confirmation of this reported change; TSA did not respond.
BBC 要求确认这一报道的变化；美国运输安全管理局没有回应。
Price said newer security machines that TSA is installing to replace traditional X-ray machines have computed tomography capabilities, which "can do a much better job of detecting liquid-based explosives".
普赖斯表示，运输安全管理局正在安装的新型安全机器取代了传统的 X 射线机器，具有计算机断层扫描功能，“可以更好地检测液体爆炸物”。
These updates to security protocols follow a move from TSA last year to end the requirement that passengers remove their shoes during security screenings, an unpopular policy in place for two decades.
这些安全协议的更新是在去年 TSA 取消乘客在安检时脱鞋的要求之后进行的，这项政策实行了二十年，不受欢迎。
Reaction to the announcements on social media was mixed. Some older users who remember a time before these policies praised a return to normalcy, while younger users questioned whether the changes signaled any decline in safety.
人们对社交媒体上的公告反应不一。 一些记得这些政策之前的年长用户称赞政策恢复正常，而年轻用户则质疑这些变化是否预示着安全性的下降。
"People have a nostalgia for a pre 9/11, it's a calling back to a normal world, and I can see that part of it," Price said. "I can see people wanting to get back to something that they feel more comfortable with, which was a pre 9/11 world."
“人们对 9/11 之前的事情怀有怀念，这是对正常世界的召唤，我能看到其中的一部分，”普莱斯说。 “我可以看到人们想要回到他们感觉更舒服的状态，那是 9/11 之前的世界。”
But Price said these changes will not impact the safety of passengers as long as core security measures remain in place and standards continue to be high.
但普莱斯表示，只要核心安全措施仍然到位并且标准仍然很高，这些变化就不会影响乘客的安全。
"I don't want to compromise [valid security measures] simply for a nostalgic feeling before 9/11," he said. "I don't think we should make those types of decisions so that we feel better. We can make those types of decisions as long as the security measures are not compromised, and that's always what I look for in these situations."
“我不想仅仅为了怀念 9/11 之前的感觉而牺牲[有效的安全措施]，”他说。 “我认为我们不应该为了感觉更好而做出这些决定。 只要安全措施不受影响，我们就可以做出这些类型的决定，而这正是我在这些情况下所寻求的。”
US airports lift shoe removal requirement at security screenings
美国机场取消安检时脱鞋要求
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