<http://www.nytimes.com/2016/11/24/world/middleeast/isis-recruiters-social-me...> WASHINGTON — In the summer of 2015, armed American drones over eastern Syria stalked Junaid Hussain, an influential hacker and recruiter for the Islamic State. For weeks, Mr. Hussain was careful to keep his young stepson by his side, and the drones held their fire. But late one night, Mr. Hussain left an internet cafe alone, and minutes later a Hellfire missile killed him as he walked between two buildings in Raqqa, Syria, the Islamic State’s de facto capital. [] Initially the threat posed by the Legion was primarily seen as a problem for law enforcement officials. But as the threat worsened last year, and the F.B.I. stepped up the monitoring of terrorism suspects around the country, the bureau pressed the military to focus on the group, according to current and former American officials. While American and British forces conducted a series of drone strikes on members of the group, the F.B.I. sifted through thousands of the Legion’s followers on social media to figure out who had actually been inspired to take action. In the last two years, it has arrested nearly 100 people in cases involving the terrorist group. Several of the arrests were of people who had direct contact with the Legion. Many of the others involved were “folks who first came on our radar because we became aware of them” through their connections with Hussain and Reyaad Khan, also a British citizen, who was another leader of the group, according to Andrew McCabe, deputy director of the F.B.I. []