Washington is renewing its focus on international aviation security as evidence increasingly points to the possibility that a bomb destroyed a Russian passenger airliner over Egypt's Sinai Peninsula, killing all 224 people aboard the jet.
Although much of the tragedy remains shrouded in mystery, a clue emerged from the doomed Airbus' cockpit voice recorder that could point to a bomb.
"A noise was heard in the last second of the CVR recording," said Egyptian lead investigator Ayman El-Muqadem.
While further analysis continues, a claim of responsibility was repeated on social media.
"With God's help, the fighters of the Caliphate managed to down the Russian plane over Sinai," said a message in Arabic purportedly from the Islamic State (IS) group.
U.S. lawmakers are reaching their own conclusions.
"I am almost ready to conclude that it was either ISIS or an ISIS affiliate," said Republican Congressman Peter King, using and alternate acronym for the group. He spoke on ABC's This Week program.
"ISIS has now fully eclipsed al-Qaida as the gravest terrorist threat in the world," said Democratic Congressman Adam Schiff, speaking on the same program.
Schiff, who is the top Democrat on the House Intelligence Committee, said IS appears to have discovered a vulnerability in international aviation that requires urgent attention.
"ISIS may have concluded that the best way to defeat airport defenses is to go around them with the help of someone on the inside. And if that is the case, there are at least a dozen airports in the region and beyond that are vulnerable to the same kind of approach," he said.
Schiff added that European and U.S. international carriers could be at particular risk. At major U.S. airports, screening procedures have been boosted in recent days.
Meanwhile, Russia and Britain have suspended flights to Egypt as the probe of the Metrojet disaster continues.
Vocabulary
shroud:覆盖
cockpit:驾驶员座舱
职场美语视频:Talking abaut future pians谈谈将来的计划
职场美语视频:Finding the right person
职场美语视频:Introducing the topic :介绍主题
职场美语视频:Asking directions问路必备英语
职场口语一学就会:博物馆、美术馆等方面词的口语表达
职场美语视频:Disagrering不赞同同事的意见
职场美语视频:Calling information:呼叫信息
职场美语视频:Are you married? 警察询问婚姻与家庭情况
职场口语一学就会:本事技术的口语表达
职场英语情景交际之老板给员工发年终奖时的英语对话
职场美语视频:用英语给他人指路
职场口语一学就会:消费者基金会等词的口语表达
职场美语视频:Which way is the post office? 去邮局的路怎么走?
职场美语视频:Reacting to news对他人坏消息的回应
职场美语视频:用英语做正式的邀请More formal invitations
职场美语视频:Giving advice给出建议,别太累了
职场美语视频:How old are they?询问同事兄弟姐妹的年龄
职场美语视频:和同事在餐馆点餐时的英语口语对话
职场美语视频:用英语问路并确认路线是否正确
职场美语视频:What do they do? 介绍家人的职业
职场美语视频:向朋友或同事介绍自己的家庭
职场美语视频:Polit request彬彬有礼的要求
职场美语视频:用英语建议和推荐Making suggestions and recommendations
职场口语一学就会:绞尽脑汁的口语表达
职场英语情景交际之到底为何被开除?
职场美语视频:Calling collect:(phone)对方付费电话
职场美语视频:用英语做非正式的邀请
职场英语情景交际之被炒鱿鱼
职场英语情景交际之为新工作考核和拼命加班
职场英语情景交际之为另谋发展,辞职离开公司
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