Since the start of the war, Russia has abducted tens of thousands of Ukrainian children. These kidnappings have been well documented by Ukrainian authorities and civil society groups. Last March, the International Criminal Court issued arrest warrants for Vladimir Putin and his children's affairs commissioner Maria Lvova-Belova for the "unlawful transfer of children from occupied areas of Ukraine to the Russian Federation."

What happens after these children have been abducted is revealed in a new documentary by my guest today Isobel Yeung, senior correspondent for Vice News. She reported from both Ukraine and Russia to uncover a system of re-purposed summer camps and foster families who have assumed guardianship over abducted Ukrainian children. She interviews the ringleader of it all-- the alleged war criminal Maria Lvova-Belova.