Dmytro Kuleba: Is diplomacy at a dead end?

Stephen Sackur speaks to Ukraine’s foreign minister Dmytro Kuleba. Horrifying evidence of atrocities has emerged from towns around Kyiv recently vacated by Russian troops. Ukraine calls it Putin’s genocide, Moscow says it’s fake. As the war turns ever darker, is diplomacy at a dead end? (Photo: Dmytro Kuleba appears on Hardtalk via videolink from Warsaw)