When Volodymyr Niankin rushed to the centre of Sumy to meet his wife and their seven-year-old son who made it to a shelter just moments before a missile exploded above, he described coming across a post-apocalyptic scene.Bodies were scattered across the ground and cars were engulfed in flames, he said, after missiles slammed into a once-bustling area in Sumy, a city in northeastern Ukraine."People were shouting and crying near the dead," he told CBC News. "My son told me that is the worst day of