<p>The Islamic State’s mobilization in the United States has been “unprecedented,” a <a href="https://cchs.gwu.edu/sites/cchs.gwu.edu/files/downloads/ISIS%20in%20America%20-%20Full%20Report.pdf" target="_blank">report</a> released Tuesday found.</p><p>According to the George Washington University study, “Isis in America: From Retweets to Raqqa,” authorities have spoken to roughly 250 Americans who have at least attempted to travel to Syria or Iraq to join the Islamic State and have a total of 900 active probes against Islamic State supporters in every state.</p><p>Since March 2014, the report found, 71 people have been charged with Islamic State-related activity — 56 arrests have come in 2015 alone, the largest number of terrorism-related arrests since 9/11.</p><p>“The profiles of individuals involved in ISIS-related activities in the U.S.