In the past three years, the FBI has invested significant resources in tracking and arresting these ISIS sympathizers in the United States. Between March 2014 and April 2017, 125 people have been charged with ISIS-related crimes. But in February 2015, FBI Director James Comey said there were terrorism investigations happening in all 50 states, and later that year, he said more than 900 were open. ISIS, said Comey, is “putting out a siren song through their slick propaganda, through social media, that goes like this: ‘Troubled soul, come to the caliphate. You will live a life of glory; these are the apocalyptic end times. You will find a life of meaning here, fighting for our so-called caliphate. And if you can't come, kill somebody where you are.'”