Terrorism defined.

ter·ror·ism
ˈterəˌrizəm/
noun
 1. the use of violence and intimidation in the pursuit of political aims.
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Terrorism is first and foremost a political tool not isolated in use by the violence of hostile bands in far flung lands, but also used quite deftly every day by those who seek power on these very shores by intimidating those who are motivated more by fear than facts.
-ELW