When Ukrainian troops liberated Izyum in the east of the country, they discovered hundreds of shallow graves in a wood outside the town. Months later, forensic experts are still struggling to identify the remains. The BBC’s Eastern Europe correspondent, Sarah Rainsford, has been talking to the pathologists and the families waiting for news of their lost loved ones. We also get the latest on today’s drone attacks on Ukraine’s infrastructure as President Putin visits its ally Belarus. And Prof Michael Kimmage, a former White House adviser on Russia and Ukraine, explains the historic and strategic importance of Crimea in this war. Today’s episode is presented by Lucy Hockings and Vitaly Shevchenko. The producers were Arsenii Sokolov, Clare Williamson and Luke Radcliff. The technical producer was Philip Bull. The series producer is Fiona Leach. The assistant editor is Alison Gee and the editor is Jonathan Aspinwall. Email Ukrainecast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp, Signal or Telegram to +44 330 1239480.