Ключевые слова: against, amendment, california, chanting, child, children, columbine, control, crowd, demonstrate, demonstration, end, first, florida, gun, high, hook, house, kids, la, los angeles, march, message, more, national, no, nra, parkland, people, protest, protester, rally, rights, sandy, school, second, shooting, sign, silence, states, student, teenage, teenager, united, usa, violence, washington, white, youth,