The layout of the app is simple. It's screen after screen of statistics about the terrorist attacks that day as well as updates as to where we stand today.

这 款应用程序的设计非常简单，每一个屏幕页面都是有关那天恐怖袭击的统计数据，以及截至目前的一些更新，每个页面都关注一个数字（这也是这款应用名称的由来）并解释这个引用数字所代表的意义。

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Al Qaeda and other terrorist groups have instructed recruits to fly below the radar screen and not to do anything to attract attention from authorities.

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And because the Department of Homeland Security must screen every refugee to ensure dangerous individuals or Iraqis with terrorist ties do not get in to the United States, the processing is slow.

NPR: U.S. Allowing Fewer Refugees than Promised