Images Appear To Show Mass Graves Outside Mariupol

Grim details are emerging about the massive steel plant in Mariupol as thousands of civilians are holed up surrounded by Russian troops. Ukraine releases evidence that Kremlin forces could be killing prisoners of war. Plus, a look at the harrowing tale of a man who hid with his family from Russian forces in his backyard shed, surviving only on bread. To learn more about how CNN protects listener privacy, visit cnn.com/privacy