Attacks Radicalization Hostage Situations Terrorist Attacks Arrests Threats ISIS-K Attack Recruitment Attack Planning Terrorist Activities Kidnapping Foiled Attacks Threat Assessment Militancy Leadership Domestic Terrorism Moscow Concert Hall Attack Militants Militant Groups Arrest Military Actions Suspects Supporters Al Qaeda Germany Investigation Convicted Terrorists Election Day Attack Plot Terrorist Plots Syria Financing Terrorism Attacks on Embassies Military Operations Material Support Paris Attacks ISPK Support Activities Suspected Sympathizers Detention Camps Militant Activities Extremist Groups Investigations History U.S. Incidents Vehicle Attacks US Attacks Lone Actor Attacks Mali Reintegration Explosives Security Operations Detention Facilities Al-Shabaab Operations in Somalia Jihadism Human Rights Violations Suspected Attacks Hostage Taking ISIS IS-KP Violence Hostage Crisis Travel Intentions Sworn allegiance IS Suspects Attack on Catholic Church in Istanbul Operations Suspect Moscow Attack Authorities Response Casualties Previous Terrorist Incidents Western Countries Russia Affiliate IS-Khorasan Province Radical Islamists Responsibility Detainees Bomber Identification Hostage Situation Abu Bakr al-Baghdadi Legal Proceedings Attacks in Oman Islamic State Khorasan ISIS-Khorasan Recruitment of Minors Foiled Plots Attacks on Concerts Attack Plans Suicide Attacks Attack Plots Security Threats Concert Threats Prison Attacks Attacks in Europe Knife Attacks Violent Incidents Kabul Attack