Sky News gets a glimpse of the harrowing impact the war is having on children who have barely seen the sky for months. By Mark Austin, presenter, and Nick Stylianou, producer, in Kharkiv, eastern Ukraine The children hiding underground from Russia Hundreds of children survive underground in Kharkiv, where they have been sheltering for two months in a city under constant attack. A metro station is now their home, school, playground and refuge. It is as safe as it gets in Ukraine's second city just 20 miles from the Russian border, but 12-year-old Nicole Bulizhenko wants to tell us it is no life at all. "I can't express how worried I am. It's so painful. I worry about everyone I love," she says. When asked about the people attacking her city, Nicole simply says: "They are not human." Her cousin, Lisa, is also 12 years old and she sits beside Nicole, squeezing her hand in support. Nicole's older sister, in her twenties, watches on with her own child, ag...