CIRB rail decision, Ukraine's Independence Day, forensic science and climate change

The Canada Industrial Relations Board has ordered employees of the country's two largest railways back to work, after a bitter labour dispute and an unprecedented work shut down. Also: Ukraine marks its third Independence day since Russia's invasion, as battles continue on the frontlines with no end in sight. Plus: We'll tell you how climate change is affecting the practice of forensic science - and how those changes could impact our legal system.