"But some analysts caution that the figures Gen. Dunford cited are relative and that the Islamic State’s online presence still must be taken seriously. In addition to the magazine, propaganda videos and the group’s periodic Amaq News Agency videos have decreased in number, though new content still regularly appears. 'ISIS’s official propaganda videos, which frequently contain executions, recruitment efforts and calls for the viewer to commit attacks, have declined in number since this time last year; however, ISIS still released 12 videos in September 2018,' said Joshua Fisher-Birch, a project research analyst at the Counter Extremism Project. 'Two official ISIS propaganda videos were just released' this week, he said. Mr. Fisher-Birch said much of the terrorist group’s old content also remains available online. Multiple high-profile terrorist strikes around the globe have been carried out by those who were at least partly radicalized by online content. 'There is still a significant amount of ISIS propaganda out there, as well as ISIS online supporters who are sharing unofficial propaganda, urging violence and sharing ‘how to’ manuals on topics such as bomb-making information, poisons, and advice and tips on truck and knife attacks,' Mr. Fisher-Birch said. 'ISIS and their unofficial support groups are still creating new material as well.' He stressed that leading social media companies still can do more to combat Islamic State propaganda, including more aggressive banning of IP addresses associated with extremist content and flagging and removing posts more quickly."