Ключевые слова: accident, aggression, aim, armed, background, bandit, children, classroom, concept, crime, criminal, danger, education, firearm, gun, hand, hostages, illegal, kid, kill, learn, learning, lesson, life, male, man, murder, outlaw, people, person, pistol, problem, pupil, pupils, risk, safety, school, shooting, social, stop, students, study, terrorism, terrorist, threatening, underage, victim, violence, weapon,