Day of Mourning in Kyiv for victims of Russian attack on August 28

Ukraine conflict Russian invasion Ukraine war war conflict Russia-Ukraine war mourning remembrance missile attack drone attack flag flagpole Maidan Nezalezhnosti half-mast Kyiv Independence Monument Ukraine flag half-mast Independence Monument Maidan Nezalezhnosti Day of Mourning commemorate victims massive attack August 28 Kyiv Russian attack August 29 2025 Kirill Chubotin Ukrinform NO USE RUSSIA NO USE BELARUS NurPhoto children large-scale attack mourning remembrance casualties tragedy conflict invasion aggression war civilian casualties memorial national grief Ukrainian resilience international response.