Extremism Jihadism Public Safety Islamism Online Extremism Military Influence Mental Health Community Safety Social Media Influence Cyberharassment Ideological Extremism Youth Youth Behavior Terrorism Peer Influence Terrorist Recruitment Extremist Groups Extremist Ideologies Terrorist Activities Counter-Terrorism Community Impact Recruitment Lone Wolf Attacks Terrorist Organizations Islamic State Ideology Youth Radicalization Homegrown Extremism Terrorism Impact Khalid Sheikh Mohammed Youth Extremism Anti-Government Sentiment Terrorist Ideology Online Propaganda Impact on Education Social Media