Ключевые слова: action, authoritarianism, banner, blood, boris, boulevard, bridge, cold, column, crowd, democracy, demonstration, demonstrators, dictatorship, documentary, editorial, february, fight, flags, freedom, killed, killing, leader, march, memory, moscow, mourning, nemtsov, news, opposition, oppositionists, people, politics, procession, protest, protests, revolution, russia, russian, shooting, sky, streamers, tricolor, walking, winter,