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RNS-Radicalization-Study1-071018.jpg
A police officer stands guard next to bicycles that lie on a bike path on Nov. 1, 2017, at the crime scene after a motorist drove onto the path near the World Trade Center memorial, striking and killing several people the day before, in New York. (AP/Andres Kudacki)
![](http://dev.ncronline.org/files/RNS-Radicalization-Study1-071018.jpg)