Ключевые слова: 1mai, 1may, 1st, 2019, adult, berlin, celebration, check, checkpoint, city, concert, controlling, crowd, crowded, cultural, day, diversity, enter, entrance, entry, europe, event, feast, feasting, female, festival, festive, german, germany, group, international, kreuzberg, labor day, many, may, multicultural, myfest, parade, party, people, police, protection, queue, queuing, security, spring, street, summer, terror, women, young, youth,