![Thousands of terrified families have sought refuge in Kharkiv's metro stations since Russia's invasion began in late February.](https://ktvz.b-cdn.net/2022/04/hypatia-h_583173222b003277e24bdc603ff2fff2-h_f27e596a5e958c0892b59a3163189a4b-300-375x225.jpg)
In a harsh lesson of war, Ukrainian children learn to tell toys from Russian explosives
By Jo Shelley and Olha Konovalova, CNN In a metro station in Kharkiv, a young woman holds up a toy car, a stuffed bear and a juice carton to a group…
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