RT Article T1 Radicalization on the Internet: Virtual Extremism in the U.S. from 2012-2017 A1 Costello, Matthew A1 Barrett-Fox, Rebecca A1 Snow, David A1 Hawdon, James A1 Ratlif, Thomas A2 Barrett-Fox, Rebecca A2 Snow, David A2 Hawdon, James A2 Ratlif, Thomas LA English YR 2021 UL https://krimdok.uni-tuebingen.de/Record/1912676788