'War criminals: whatever you do, we'll record it': the 'merciless' Ukrainian film about Mariupol

20 Days in Mariupol by Mstyslav Chernov traces the Russian siege of the port in harrowing detail. Here, he discusses his documentary with a fellow war reporter Russia-Ukraine war - latest news updates Kyril, aged 18 months, struggles for his life after a Russian rocket hits the family's apartment block in the early days of the siege of Mariupol, Ukraine, in March 2022. In vain, his mother pleads "You couldn't save him?" to the also tearful doctor. Then, in disbelief, "How?" She weeps over the ti...