A terrorist is defined as a member of a group that engages in acts like kidnapping or murdering civilians for political intimidation or as the leader of an armed group that kills civilians. Terrorism methods include the use of firearms, explosives, chemical and biological agents, and potentially nuclear weapons. Prevention of terrorism involves primary prevention through education to understand differences in cultures and beliefs, prioritizing peace and equality for all people, and eliminating root causes. It also involves secondary prevention such as surveillance systems, protective measures for citizens, and improving security systems.