 We also heard on the programme from a Russian official denying that Russia targeted the Children's Hospital and saying that it was part of the Ukrainian air defence system that fell onto the hospital, something the Ukrainians have denied. And all this happens as Western leaders are gathering in Washington for a summit of the Western Defence Alliance, NATO, that's going to consider matters in Ukraine quite closely. So let's speak now to Alexander Kara, a fellow at the Centre for Defence Strategies, a think tank in Kyiv.