BY Jillian C. York
As the Islamic State (IS) has conquered more and more territory across Iraq and Syria, the jihadists have added another tool to their arsenal of terror: the Internet. IS propaganda officers have used YouTube, Twitter, and chat platforms to boast of their accomplishments, promote terror by posting videos depicting the beheading of journalists, and recruit young people to their cause. A recent estimate suggests that at least 2,000 Westerners have traveled to Syria to fight alongside IS and other groups -- many of them recruited online.