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See: List of terrorist incidents & List of ongoing conflicts
Department of state is the lead agency for terrorist incidents that occur outside the US.
deterrence, detection, defenseand response to terrorist incidents.
Approximately 50-60% of terrorist incidents involve explosives. This makes explosives one of the most commonly used weapons by terrorists.
No they are not as a collective on the terrorist watch list, but there are people that have gone that were on the list.