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 Ukraine flag half-mast Maidan Nezalezhnosti Day of Mourning commemorate victims massive attack August 28 Kyiv August 29 2025 Russian attack increase 23 victims children Kirill Chubotin Ukrinform NO USE RUSSIA NO USE BELARUS NurPhoto large-scale mourning commemoration casualties tragedy conflict aggression remembrance loss grief solidarity resilience invasion humanitarian crisis.