Sometimes thought of as Al Qaeda's more tech-savvy younger brother, ISIS has a robust social media and propaganda campaign that is used to get young militants to join its ranks.
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The world has come to know the infamous ISIS videos in which they display beheadings or send threatening messages to their declared enemies. But just how many resources does ISIS put into its propaganda campaign, and does this help bolster its image as a threat, or does it ultimately reveal its weakness?
Read more about ISIS videos:
The Washington Post: Inside the surreal world of the Islamic State's propaganda machine
CNN: ISIS's brutal beheading video: Search for clues